So this is part of it to me.
A self-roast of gen z tropes would need to be coming from some one who [is able to embody/portray] the part. For me it’s less about the fact that he technically falls into the millennial group and more about that [comes across to me in my perception based on his performance] as being 30 at least which is just too damned old to be doing a self-roast of a teenage culture that’s reputed to exist somewhere. So I don’t see it as a self-roast so much as an attempt at generational humor. Except it’s all stereotypes that basically gen z is inheriting from millennials so it’s kind of… stale.
