Yes the acquiescence of all editorial and publishing decisions by these tech companies to “the algorithm” (which somehow absolves them of responsibility) is the main culprit there.

These platforms are more like radio infrastructure or TV infrastructure than any particular channel, and for the most part anything they specifically promote and fund doesn’t tend to be that alt right content which is completely algorithm driven and ad/sponsor/dark money supported.

We need to employ nuance when discussing these platforms.