Some clear patterns can be seen in levels relating to player behavior. Would be cool to hear your versions.
0-10: Everything that kills you is noob merc and noob ability. Teams always suck. Teabag and GG EZ fagit always when possible.
11-20: Some of the things that kill you are noob mercs and noob abilities. Also teams suck always when losing. Rare teabags and gg ezzes.
21-30: Some mercs and abilities might be tad overpowered, not screaming about it on chat. Teams might be shitty, but you wont spam chat about it, might give pointers. No post game drama, possible tips to better game, occasional GG WP and acknowledgement of enemy teams achievements.
30+ Zen mode. Whatever, just play.
I’ve seen multiple lvl 30+ guys dragging lowbie teams with a quadruple score to the #2 of their team and no words uttered. On the other hand it’s almost certain that an under lvl 10 player with sub par scores will scream team sucks or gg ez rekt scrubs in a right (wrong) situation.
lvl 10+ servers are very chill as people know how to generally play and don’t frustrate team mates with not playing their mercs role.

