I don't have so much words I hate, probably except couple. It's russian and I can't accurately translate it to english, so you probably won't get it.
"Парниша" - I hate this word, it's translating like "guy" but somewhat different. I'm really hate this word, very, very much. When I learned in the university every hipster used this word to adress others, including me. I hate this word so much, it's pissing me off completely
And also using many anglicisms in russian language, when even ordinary word changed to english, I hate this too, really hate it very much. Always when I see it, even if I understand it (for most part I am, of course) I pretending that I do not understand, demanding correct translation for this words. I'm some kind of purist for russian language.
And the word "интеллигент" when somebody adress me with this word. I'm not going to hate my nation, culture, and try to sell my country to foreigners, like "intellegentsiya" doing since 19th century. For me this is offensive word and using it when adressing to me is making me angry for sure