Not in the "hate" camp, but I'm very picky with anime. I recognize it's a wide genre with tons of legitimately great productions.

There's a lot of anime stuff that just irritates me for reasons I've not been able to put into words other than "it makes me cringe from embarrassment." Female characters that are less an interesting or fun character and more like an endless void of cutesy vibes and nothing more, the anime pratfalls to punctuate a joke, weird creepy stuff towards women, laughably edgy characters, changing art styles to something tonally clashing for comedic effect (only example I know off the top of my head is in Hellsing Ultimate, which I'll admit I've only seen in the form of the abridged series), overtly blatant fan service, all the characters being teenagers, etc. Tropes like these tend to irritate me to the point of getting in the way of my enjoyment of a show and it kills a lot of anime for me.