It is a deep film with many themes but one main theme involves a curious plot device. From the Wikipedia article: "The Zone contains a place called the "Room", said to grant the wishes of anyone who steps inside." The theme of that plot device is that once a group of explorers finally get to the room they refuse to go inside. The "Room" isn't a monkey-paw like device that distorts your wishes and gives you a bad outcome, rather it sees inside your soul and gives you what you truly desire. It raises questions about man's conscious desires compared to his unconscious desires. Do you really want to know what you truly desire, even the desires you hide from yourself?
I can't do justice to the film but I think of it often and usually with respect to AI and the unreasonably effective algorithms that drive modern feeds. TikTok is in some ways our first true glimpse into the "Room" of Tarkovsky's Stalker.
All this to say: I don't see any of the things you are saying you see on TikTok. Whether you like it or not the algorithm is sending you what you engage with. You have been sorted into the "desires wild canoe ride" TikTok. You are sorted into the "desires smug fashion gatekeepers" TikTok.
And if you happen to have read this comment and haven't seen Stalker - it is still worth it.