There are support classes like boomie , arms warrior with cc and war banners
And there are classes with pure damage. These pure damage classes play near support classes like boomie and arms warrior and use their cc etc skills on 3s.
That’s why 1v1 and 2v2 are unbalanced.
Boomie and warriors never good in 2s because of that.
To make it clear essences and azerite traits what make it unbalanced in my opinion.
The problem is that everyone is extremely squishy, not that MM damage is extremely strong. My 21k hp MM dies to 1 stun lock of rogues as well, and paladins take 70% of my HP before I can react after getting a 6 second stun.
PvP is greatly imbalanced because of some classes not having hard CC, some having too much of them, and some having extreme defensives.