This game is like a manual for how to be the worst party member ever.
Killstealing, gathering materials while in combat, running off and fighting enemies on your own, watching your party die and looting their corpses, taking them to a map that's too hard for them... I'm amazed people are letting you party with them.
Then again, those parties like you more if you let them wipe and then finish the map, compared to completing the map with the entire party alive, so I guess they aren't the smartest group of people either.