Game of Thrones in the early seasons had interesting intrigues and there were a lot of options for who could be the next king or queen. Plus it had a way of making you care about a character before they were killed off. Yes I'm still salty about Oberyn Martell.

Then the politics and intrigue became increasingly less important as it became Dany + allies vs Cersei + allies. Yes there were a lot of other issues in the later seasons such as the whole fast travel issue, but that was just the tip of the iceberg.

My only exposure to GoT is from the reddit watchitfortheplot subreddit. You mean there was more to it then sex?