i irrationally hate the actor that played the mother from How I Met Your Mother. Maybe i just hate that doe eyes look she seems to be inflicted with. And she seems to always be playing some sad sack in a bad relationship so it might just be type casting too. Plus the end of HIMYM was so fuckin bad so that might not help lol.
Seth Rogen. All the roles I've seen him in boil down to "lmao weed" or "men should be measured by their hearts, give the schlub a chance".
The first trope I can deal with, but the second always gets on my tits. Women who are more attractive, successful and smart being portrayed as a reward for simply not being a raging asshole to them (while otherwise being a fuckup) is part of what creates a lot of "nice guys".
He also made that movie about killing Kim Jong-un. Hating Seth Rogen is rational.