We need to get this resolved, if they quit, that is on them, and get banned. However, the disadvantage is still there. You should replace it with a bot that is on whatever the level the rank is, so that way we can always have a somewhat fair shot.
Also, I did talk a lot of trash about the multiplayer but after a while of playing it, I understand the goal here and to be honest, I like it a lot and it makes sense why it is set up this way.