Bit of fun but mine would be:
Disney adults. Adults invested in any content/products aimed at children just give me the creeps. Sorry, Adult Disney fans. I will judge and I'm not a nice person for it.
Food served on paper napkins. What is that about?
Skin coloured leggings. You look naked from the waist down and its hugely unforgiving.
Long hair that is constantly being swept up, or side to side, by the wearee. Particularly around food.
Men who don't shave their head when the male pattern baldness kicks in.
Hair scrunchies. They were awful in the 80s. They still are.
The public on the radio. Just no.
Remote controls in hotel rooms. I can't bear to touch them.
There is never a reason for more than one exclamation mark in any given sentence.
Pronouns in signatures. Worse: the hand imagery spelling out someone's name in BSL. Just why? I'm deaf not illiterate.
Wet floors at the public pool. I know. But it still makes me experience a tiny bit of sick in my mouth.
Unintended bra bulge.
Cats on counters.
Grown adults referring to their parents as mummy and daddy. I appreciate that's more a cultural thing on the island of Ireland but it does make me die a little inside.
Uptalkers and vocal fry.
Americanisms coming from English people ie 'math'. Actually, that doesn't give me the ick so much as the rage.
I am a terrible person.