I'm definitely not gen z (30), but yeah. I do definitely think there are lines in comedy as do many of my friends, but I grew up on some really tasteless shit. As a teenager I liked a lot of it, but as an adult I've come to want nothing to do with comedy that's offensive to be offensive unless there's a point. I still love Always Sunny, but south park stopped amusing me when I became an adult.

I honestly think a lot of it comes down to millennials seeing jokes explicitly at the expense of people just living their lives as offensive or in poor taste.

But also I think the concept of offensive has basically become so culturally loaded as to be difficult to use for anything other than mocking those whose sensibilities or sense of humor differ from yours.