My teen is a big Redditor and definitely notices poorer quality content. He knows my choice to no longer be there, but it’s not like I tried to be evangelical about it: he needs to decide for himself what values he stands up for, how he chooses to spend his entertainment time and attention.
He’s fascinated by human motivations and is a big reader of r/AmITheAsshole. It used to lead to some great discussions. We have t noticed whether there are less frequent postings but there are definitely a lot fewer worth discussing.
Unfortunately last timeI checked on Lemmy, there was a fledgling community but neither the scale nor the cultivation to be interesting.