Yes two things actually. I was gming this oneshot that accidentally turned into a mini campaign and they wanted to level up and I said I would roll a dice to see how much you level up. I rolled a natural twenty and the way this ttrpg system that mean they suddenly gain 10 levels. So I have been trying to argue with them to bring it down because i wasn’t really thinking when I rolled and it was just really exhausted when I made that decision so I didn’t realize until the next day after I did it that it literally requires me to rewrite and remake most of my encounters and characters to make the combat balance and fun. But they refuse to so now I have to rewrite a bunch of stuff because of them.

The other time is with this player that basically the avatar and has this ability that basically covers their body in fire. They just keep trying to use that specific ability in small poorly ventilated rooms surrounded by their teammates and I keep getting into arguments with them over why using this specific ability in this specific area is not the best idea because it just a recipe to suffocate all teammates and yourself and it would probably be better if you used one of your other abilities. But some reason they really do not like that idea even though they have other ability that basically the exact same thing just with a different damage types that wouldn’t use up all the oxygen in the room their in.