It might be the weakness of this particular website format. I have seen sites that have found ways to keep discussions from devolving into vitriol. Tildes keeps their flow of new users slow, and verifies everyone. Mastodon is literally whatever you want it to be, because by default it doesn't push content your way, you have to seek it out.
I did kinda hope the honeymoon period for lemmy would last longer, but this is probably inevitable. I'm just appreciative of the in depth conversations I do have here amongst the vitriol.