Its always been like that.
Republicans call it the "free market", although that often ends up with an oligopy or monopoly.
Just obey their terms of service, or use another service.
Well, actually, that's nonsense. It was Republicans who fought for Section 230, which affords website publishers the status of non-publishers in terms of general immunity regarding third-party content. The idea was to promote the entrepreneurial spirit and protect free speech. For a while there it was working just fine. But, of course, Democrats eschew its enforcement as the prevailing big tech oligopoly serves them; more at, the latter is in league with them, ideologically. But, then, the lack of enforcement also serves the economic interests of the oligopoly by stifling competition.
Trump's mistake was to rely on Congress to enforce the provision. The executive branch enforces the law. He should have invoked antitrust law when it became abundantly clear just a few years ago that this oligopoly had no intention of honoring the terms of the provision, particularly regarding the free speech of conservatives, whose reasoned opinions of common sense and decency had come to dominate interactive social media. Now those voices are being systematically deplatformed/demonetized. But, then, leftists have always employed various mechanisms to stifle the free exchange of ideas as the madness of their ideas cannot withstand the cultural dynamics of competition. Their ideas are batshit crazy, and the stuff of obedience and conformity.