the government is basically subservient to him, and there isn't anything stopping it from making a company cease to exist other than the status quo. If, for whatever reason, him (or in his absence the rest of the government) decide they don't want it to exist, it won't exist. It might not be as explicit as how the CCP does it, but it will have the same result

This might be true for small companies, but it's delusional to think that Trump could unilaterally put an end to one of the major tech companies. It would be a huge legal, political and financial battle, at a minimum. Either you're overestimating Trump's power or underestimating the power of the tech companies.