Don't forget, an important component of dictatorships is controlling the media
Trump can simply encourage violence against their employees and make them untenable in other ways. Like bring them to court at one of his bribed justices to cost them money
There's lots of ways to kill a company in a way that isn't obvious when you're a dictator
Just remember, Mafia bosses won't tell you they'll injure you. They use coercion and subtle threats