I'll start:
Trump - For managing to conduct himself even more poorly as POTUS than Nixon, Reagan, Bush Snr, and even Dubya, which I though was impossible. Major cunt.
Oprah - obnoxious and annoying at any size. Her latest victim act about people making fun of her weight battles is particularly offensive. Her fucking annoying friends and other people she foists on the public.
Harry and Meghan - it all started with a statement from Harry telling off the press, and people who comment on newspaper articles and SM, at her behest. Then Harry lapping up her crap about his family being "the family she never had". Yes, he was obnoxious enough to state that publicly, then there was the matter of inviting celebrities they barely knew to their evening wedding reception, but not old friends, colleagues, etc. Meghan only invited one family member to the wedding but the couple invited Reese Witherspoon to attend. Reese declined as she had never met them. All the victim and famewhoring bullshit they have subjected us to since.
Jolie - for repeatedly revising her face when she was beautiful and didn't need any of it. The try-hard heroin phase and bad-girl-who-takes-knives-to-bed horseshit. The UN Audrey Hepburn cosplay after all the BBT sex stuff. The marriages. Hoarding children. That leg sticking out. Playing hardball with Pitt to the extent that Hollywood made more than one show of clearly displaying that they preferred him. Victim and famewhoring bullshit.