A free market doesn’t mean you get whatever you want wherever you want it. It just means there’s no unsurmountable barrier to entry into the market.
Microsoft, Apple, Spotify, Netflix, etc. + VC money, all have the money and means to compete directly with YouTube if they choose.
The market for “I want to watch Trump claim he stole the election without a disclaimer in the description” might not be that huge. As others have pointed out, creating news about election misinformation is still no problem on YT provided it’s explained as misinformation and not just provided without context.
Also, these content providers can self-host their video content and promote their content as they see fit.
You have to decide if bookmarking the sites of your favorite content providers is a better option than accepting YT’s content guidelines.
But you don’t get to demand that YT host whatever content suits your views. They can curate their platform as they see fit and you can consume it or not as you see fit.