Let me offer an alternative point of view. It's not that we as people are less invested in shows and spend less time discussing them. It could be that you and your friends you speak to are in a particular age group that doesn't prioritise discussing shows anymore as you have millions of other more "adult" things to think about. I belong to this group for sure.

I do however agree with you that content nowadays is pretty low quality. There are some good shows/movies going around, but they aren't the same as the good ol' days. Maybe I am just old....