I don't worry due to influencers, I worry due to the seemingly, if you're not far left and intolerant of other opinions, and also attach a tonne of labels to yourself, you're a horrible bigot. That seems to be the loudest issue for young people IMHO.
Young adults at University not allowing debates due to their beliefs, not liking being challenged. They're only happy in their little echo chambers.
In addition I worry about teens accessing porn, and believing that, it's what sex is like, they have access to some if the most extreme and violent porn and its at their fingertips. Young boys believing that degrading, spitting and strangling their partner is normal. Young women writing on Reddit et al, saying that their bf has done xyz and being told that they're a prude for not liking it. That is a worry. Young Lesbians writing that they're repulsed by penis, and being told they need to get over it.
I worry about social media in general, as it spreads false information like fire and people believe it, and when you challenge someone with facts, they call you a liar. I really do believe it's damaged the fabric of society in the Western world. There was a documentary on Netflix called The Network (I think) and it explains why.
So yes I worry about future generations but for different reasons.