I feel like, and I really wouldn’t know to be honest, you could maybe make the argument with a bit of a redefinition of worst.

Tiktok might not be objectively worse in terms of data collection and such, but does it’s vast popularity counter balance that to some degree? My general impression is that tiktok is ridiculously popular and installed on many, many devices. However I also have no idea if/how much worse it is than other social media apps, that potentially have a similar install count. I’ve heard it’s pretty bad, but couldn’t tell you myself.