Yes, definitely Vampire Diaries. Although to be fair, it was actually a really good show the first 2 years. Fast paced, great characters, lots of "OH CRAP!" moments. But it turned into a hot mess somewhere around season 3.
Grey's Anatomy is the worst, but I've consistently watched it for like 8 years now.
Game of Thrones & The Walking Dead both make me grumble in frustration, but I still tune in every week.