Because those companies rightly recognize that this administration is following no rules? Like, they were jumping on board for the fascism explicitly, businesses love fascism because it always kills labor rights. All you have to do is stay out of the ire of the dictator and you can do very well.
Like always, the morons who carry water for the fascists think they can "control" them, or radically underestimate the damage a moron with no accountability can do.
Amazon tried to barely show consumers the tariff hurt them, and Trump called Bezos directly, and that plan went away instantly.
Companies are rightly afraid of an administration that demonstrably has nobody stopping them from doing outright criminal and illegal things, and has a rabid fanbase ready to plan bombings of whoever is the target. They know the courts can't protect them. They know the law means nothing right now. They know an entire board can be murdered and the culprits pardoned if Trump feels like it.
Trump's entire shtick is that people who go against him in the Republican party already get primaried. He doesn't even need to ask his supporters, because loyalty is an expected and intrinsic part of the MAGA movement.
This is also assuming that future elections are free and fair, or at least follow previous US rules.