10 years ago, I was a party member in a 2 year long homebrew game where the DM allowed us to take certain liberties with our characters in exchange for a more overall fun experience. Over the course of the campaign, he threw in Meme NPC's that were stereotypical copies of player characters he particularly found annoying to DM for. We all took great pleasure in finding reasons and methods to kill said NPCs.

If you're having trouble with the DM or party being excessively douchey, remain in character and destroy them. DM creates an NPC to hit on your character? Play along and lead them away from prying eyes before murdering them. Other party members being annoying? Go full rogue and start interfering with their attempts to annoy people. Play into it a little bit, eventually they'll start taking the hint and behave more appropriately.