I used TikTok for about a month earlier this year out of curiosity. I feel like it still has significant effects on my emotional and psychological state months later. I can't imagine what it does to a person to use anything like it daily for years.
Personally I'm glad that that the hyper-availability of information was something I experienced only after I became an adult, so I'm able to be more aware of how influential the firehouse of information and manipulation by algorithms can be.