The problem is that the more skill you have, the more effort you need to put in while playing. So if you get too good you can't have a fun relaxed game anymore

The problem is that the more skill you have, the more effort you need to put in while playing. So if you get too good you can't have a fun relaxed game anymore (without getting wrecked and losing rank). Smurfing (playing on lower rank) or cheating (playing effortlessly at your real rank) would be a solution for that... but they are obviously bad and unfair for others. The new scrimmage mode seems to be a promising solution for that though.