Qp penalties for leaving are pointless

why is there a penalty for leaving qp matches early? i got banned from playing arcade and qp for 10 minutes because i got junkertown back to back and didnt want to play the map again. this is a pointless penalty- people can be toxic, throwing, or real life things can come up and cause a player to need to leave the game. why are we punishing casual players for playing the game mode that is supposed to allow you to practice and be noncommittal for whatever reason? this is an awful, annoying change and if they keep this qp leaving penalty i may actually uninstall. just another useless change.