What you are subjected to on each platform is based on the discovery methods of that platform. There are probably very good reasons that American sites tend to have really bad discovery, it means that Ads are more impactful and it gives the creator of the algorithm all the power.
So it's not that bad people don't exist on TikTok, but because their discovery system is so good I end up watching content that I like. Whereas on YouTube, because the discovery system is so poor, I am subjected to watch things that the platform favors. YouTube favors high-energy, face-contorting, lowest common denominator content. Up until now because YouTube has been the only source of internet video, I had to go along with it as it was the best we had. Suddenly I don't.