for your own sanity, use the damn block button.
don't engage trolls or provocateurs, block them and move on.
if you're on here you probably don't like algorithmic feeds, guess what not having one means? The block button actually fucking does something! so use it to moderate your experience.
and? so what? getting the last word in isn't everything.
For some, a temporary lack of self growth; for others, certain mental illnesses. It's as awful as it sounds if you really sit and imagine. The self awareness needed to rise above some of that? Many will live and die never having reached it.
The misguided brain can hang itself up on nearly anything, and for many it's the semblance of validation. There is quantifiable pain behind the need to interact for some people.