While the game has an amazing base idea, Gaijin has done absolutely horrible at keeping their game playable for everyone. I understand that monetization is necessary for a free to play game, Gaijin has repeatedly gone with money over player retention and experience. It was bad a few months ago, but with this new update it has become impossible to progress without using your own money. The economy has gotten horrible with repair costs and rewards from the work you put in.
My next problem is the battle rating system. It's a good idea, but a regular M4, the first M4 with the 75, should not be put against a 4.7-5.0 tank. You're putting an early war tank against a late war tank, that's a nearly impossible fight to win.
WarThunder is a good base idea but acted out horribly, and the player base is responding as they should, fix your game before no one plays it.