Weeds. The show is ultimately so unsatisfying. I hated the main character by the end. Seemingly immune to any real consequences.

Heroes. I should have just stopped at the end of season 1. I mean that was the original intention right? it was just a one off "tv event" thing. Season 1 was good, it was great, it wrapped up nicely....and then NBC wanted more.

Battle Star Galatica. I guess both the original when it was on TV waaaaayyy back when but more so the reboot. They story creators had to plan the ending the way it went, but I was deeply annoyed by the whole final arc.

This is probably a common answer, but game of thrones was it for me. It was such a good show until they sped through the last two seasons and picked quite possibly the stupidest ending they could have. It is like they simply forgot who the characters were.

Didn't watch a single episode of house of dragon despite my one time obsession with early GoT, and I won't out of spite.

Game of Thrones without even watching the last two seasons (started late and 7 dropped while watching 5). Was really enjoying the slower pacing and character development that fell by the wayside as the seasons went on.

Walking Dead, although I bailed at the end of the season before Glen exited when I realized that Maggie and Glen as a couple was the only reason I even had it playing in the background.

Days of Our Lives fifteen thousand episodes in and the quality just isn’t there anymore.

House of Cards US version.

Seasons 1 and 2 were excellent and still rank as some of the greatest TV of all time.

Season 3 was a mess.

Season 4 the show returned to form and was pretty good.

Season 5 was a steaming pile of dogshit. I am disgusted that I made myself watch it. It was so staggeringly stupid.

Season 6, I didn’t even bother to watch it.

I should have dumped it during Season 3.

I got really into Lost. Like really into it. I was on message boards, sharing theories, doing alternate reality puzzles, hacking websites, going to live events, eating apollo bars, reading bad novels, full tilt. It felt like an actual mystery we were actually solving.

Then the quality of the show started to dip. Plot threads were dropped due to external factors, like Eko dying because the actor hated living in Hawaii. Walt aging too fast. The writers strike shortening Libby's backstory. Nikki and Paulo. The Dharma Initiative being poorly received. And it became clear that there wasn't actually a satisfying conclusion written. The "mystery" was that the writers weren't sure what happens next. They weren't making the show for me. They weren't counting on somebody studying Egytian mythology to decipher the significance of a four toed foot, or learning finite math to establish a relationship between the Numbers. I was imagining answers that were never there, and posting them on the internet created backlash. The writers admitted to changing some plot threads because they didn't want to spawn more internet scavenger hunts.

And looking back, the show was fine. It was clever and twisty and well acted. Characters developed and grew. Some of the show still sucked, but it wasn't the massive disappointment like OG Dexter or Game of Thrones. The end is satisfying, if you're not really thinking too hard about the unanswered questions.

But yeah, I got too into Lost.

Some of the others I would've said have already been mentioned so I'll go with How I Met Your Mother.

I didn't really have any interest in it to begin with. An ex talked me into watching it while we were dating. It certainly has it's moments but at the end I was pretty annoyed for the overall waste of time.

Game of Thrones. Also, I agree on The Walking Dead but I gave up pretty early, season 4 or 5 maybe? They had just met Negan. The plot was just so repetitive.

Dexter for sure, but also Sons of Anarchy

They both jump the shark and never recover

So I am very picky with series and I rarely start stuff that I feel I am on the fence on and I drop stuff pretty fast it I am not feeling it.

That being said, there were a few huge disappointments that I regret wasting time on.

Man in the High Castle - I didn't know this was a fanfic-level script that just used the setting. Up until the end of the second episode, I was still hoping that it would at least loosely adapt the story of the book. I was really disappointed when I realized it would be purely a fanfic story when I watched episode 3. An adaption of the book could have made for such an intense ending.

Alien: Earth - Forced myself through the first three episodes. Did not like it all, Peter Pan stuff, uninspired characters, trying too hard to be edgy (while still being fundamentally PG in its themes). Then I heard that Episode 05 was a cool self-contained episode that offered a nice throwback. Watched 15 minutes of it and turned it off. Absolute trash.

Ring of Power - I am a big fan of The Silmarillion even though IMO it's rather dense and difficult to follow. Watched a single episode of Ring of Power and I immediately dropped it (not getting fooled again).

Lost shat the bed season three, but I kept watching anyway hoping we'd return to season 1 and 2 goodness. It just got worse and worse and then petered out into a they-were-dead-all-along-esque cop out ending. Fuck JJ Abrams and his "mystery box" shit.

Merlin, the whole show teases the idea that he will reveal his powers to Arthur eventually. Spoiler alert: He never does.

The umbrella academy.

What a stupid

Fucking.

Ending

This is a Korean show, but Bulgasal. K-dramas are already notorious for being long, and this was no exception. It was 16 episodes that were each 1.5 hours long. Dramas that revolve around a love story (ill-fated lovers on this one) have no business being that long. And the worst part is the last episode violated the entire show's lore rules just so it would be a happy ending.

Dexter/Walking Dead

I might catch hell for this but I gave up on Breaking Bad. When Walt and Skylar were split up and just fighting, I looked at my wife and said, "this isn't fun anymore. This is just watching a couple fight. I get this all day as it is."

What we do in the shadows -- I loved that show, but they fucked it up so bad with the last two series. The writing was all over the place and it was relying too much on random celebrity cameos. It really shows in the last series that they ran out of plot and just kept going anyway.

Sex education had a great first series, fine second series, terrible third series and a final series I could only watch one episode of before giving up.

I'm surprised nobody said Supernatural yet. It's still one of my favs series, but I keep to the first few seasons and rarely go up to 10 when I'm really bored. Never watched the last 2-3 seasons or I forgot about them if I did. I read about the ending and I am just sad about it.

Stranger Things is also one that I wish they ended after S1. Though I did kinda like S2, I have yet to watch S3 and up... Can't we get good short series anymore? It's not a long series, but still feel it is going to end one...

Seinfeld, there's way more miss episodes than hit episodes. The peak is the middle few seasons, and even then it's 50:50 at best.

Supernatural - I watched the first 9 seasons, that was 9 seasons too many. The Expanse - I watched all of it, liked none of it.

Steven Universe.

Holy shit i missed some of the early hiatuses, but I'd argue the later ones were worse because of the direction the stories took. And coming back after months of nothing to a quartet of garbage pointless filler (yes Lion 4 is garbage) should've warned me to abandon ship.

I was a huge fan of the comics but I gave up on The Walking Dead in Season 2. Season 1 was a blend of zombies, interpersonal relationships, and to a lesser degree surviving in a post-apocalypse. Season 2 quickly devolved into a boring gab fest where zombies and post-apocalyptic survival seemed a distant after thought. I don't think I saw a single episode of season 3.