As a matter of law in the United States you are objectively wrong. This has been settled in a series of SCOTUS decisions starting with Buckley v. Valeo (1976). Corporations are legal persons, and further the individual humans that make them up do not somehow lose the free speech rights just because they decide to take collective action.
And in turn: as a matter of morality, common sense and the point of free speech you're also wrong. It's important that people be able to speak to power, and a core part of that for humanity is socializing, being able to form groups to support each other and pool ideas, skills and resources to have a greater effect than what any individual alone could accomplish. Seriously, you say "corporations don't have free speech rights"? Exactly what form of combined effort do you imagine most, say, NEWSPAPERS are organized under? So what, you think individuals should be able to investigate something all by themselves, but the government should be free to put the boot down on newspapers because they're corporations? You think that jives with free speech?
Oh maybe you only meant "the bad ones". That makes it very easy, but no reason to limit it to corps in this case, just stop "the bad humans" too and everything is great. Nothing could possibly go wrong with that plan, since everyone agrees who "the bad ones" are.....