What is blatant about this is the platforms get big, so big it is very hard to compete with them, without all this censorship.
Then they use their power to censor,and it is extremely difficult to come up with an alternative.
We must do what we can to create alternative, and fight them that way.
It is also worth the effort to call out their abuse of the power they have, much of it subject to regulations that make it difficult to compete with them, such as all the banking regulations.
There are already laws to fight this kind of thing, probably still on the books, dating from the days of Teddy Roosevelt.
The big thing back then was monopolies and “trusts” (think OPEC). The danger from such entities was well understood and applies directly to what these companies are doing. Those were also “private companies”, but the laws against these kinds of control applied to them.