One of the best life hacks is never get the last word in on Reddit.
Utterly deranged.
Amen. From about 1999 to ~2010, I was a practitioner of "don't wait up: somebody's wrong on the internet."
It gradually dawned on me that it was better for my mental health if I just avoided arguments as much as possible. I'm not perfect about it, but I rarely get into pissing matches these days.