Apple - while their products are undeniably good quality on both HW and SW sides, I hate their business practices, overpriced products (monitor stand for $1k ?!?!?!?!), and being anti right to repair.
Epic Games - partially owned by Tencent (a money hungry Chinese company), PC exclusivity deals, anti consumerism
Elon Musk - nuff said
Andrej Babiš - a Czech politician who used to be in the communist party back in the day (and denies it), a millionaire, a liar, a thief, and in general piece of shit. I will never buy any products made by companies owned by him (sure, they are not “his” per-se, because they can’t legally be, but I am sure he still profits from them through money laundering).
Tik Tok - app by the Chinese, with tracking and information gathering throughout, and an ultimate time sink. Stupid trends start there, and it does absolutely nothing for the humanity.