@Druid congrats!
(And I await more shitposts ;))
What comes to mind is Fire Giant in Elden Ring. Not on my first playthrough since I was not spoiled on him (and he was quite easy). But on my first RL1 playthrough I had a reaction like this, since I heard from many places that Fire Giant is supposed to be such a big roadblock for such a run. I beat him in about 5 tries? He was quite easy. On my second RL1 playthrough I even beat him on my first try.
I am currently playing my second randomizer in Elden Ring. After having had an enormous amount of fun with my first randomizer playthrough, I've now added another restriction: not with the randomizer software, but I combined it with my favorite challenge run: I'm playing at Rune Level 1! This is either going to go great or end in disaster. (With my luck I'm half expecting Consort Phase 2 in Golden Godfrey's arena).