I kind of feel the same as you. I'm happy that Parler is gone but on the other hand I think that Google, Facebook, Amazon and Twitter are monopolies and should be broken up.
One can always list all the players in an industry and call that set "a monopoly and should be broken up". Or we can just take this for what it is, which is that some entity is so toxic that none of these companies (which compete with each other otherwise) want to touch it.
Google, Facebook, Amazon and Twitter are
monopolies and should be broken up.
For a monopoly, you need anticompetitive practices. Is Facebook unfairly preventing the success of other social networks? A good example of a monopoly was 90's era Microsoft, which prevented its OEMs from shipping competing operating systems.
Terminology aside, I completely agree with you that we need far, far more choice in the marketplace.
Granted these are just lawsuits at the moment and not final verdicts but still it's not hard to see how they don't play a fair game.