I think you're confusing political polarization with authoritarianism. The U.S. has been undergoing a massive wave of polarization since the 1960s, i.e., there are significantly less moderates and party ideologies are further apart. I agree that this is a huge issue.

However, that doesn't mean authoritarianism is on the horizon. For that matter, the suggestion that companies acting on political ideologies show this is absolutely asinine and not supported by history. Recall the Red Scares and McCarthyism, both of which resulted in private companies blacklisting and firing individuals with communist ideologies. Consider also the extreme private media bias in the Revolutionary War. The last decade is not an anomaly that signals doom. Further, firm ideologies -- when present -- tend to reflect the employees of the firm, and not whatever third-party authoritarian you're suggesting exists, see, e.g., here.

You're confusing the desire of companies to ban people -- "walking liabilities" might be a better term -- that promulgate disinformation, violence, and attempt to overturn elections with Nazi Germany, which (now that I type that out) is extremely ironic. I suggest that you might be the one who isn't self-aware. I also find it hard to believe the future will find anyone but those who attacked the capitol to be on the wrong side of history, but you're welcome to keep thinking that.