Most of the things Andrew Tate pushes are not harmful. Stoicism isn't bad, it's massively undervalued in today's society. I'd say that most of today's modern sensibilities are the toxic influences that end up seriously harming the mental health of millennials and zoomers.

It's super easy to tell: the more in touch they're with them, the less reasonable they're, the more they get hung up on irrelevant things and have outbursts about completely asinine topics. They always have to be treated with silk gloves and if someone doesn't they'll try to get them cancelled.

Tate just adds silly amounts of narcissism as well, what people call "being alpha" and "sigma" right now. And that obviously ends up harming other people.