Why if I won 10+ matches in Arena TS without increase my CSR absolutely NOTHING! and after that I lose a game, yes ONE GAME and I lowered significantly my CSR!! Does one of you have the same thing?
Likely because you were playing as the system expected so your rank isn’t going to move up very much. You’ll want to read through this thread and then the other two Feedback threads after that one and the latest one for more info.
There are dozens of threads about it (some already linked). You are either gaining/losing 1 or 15 CSR. There is no 0 CSR change to my knowledge. So those 10 wins were expected wins and thus you only received minimal CSR. The one where you dropped 15 would be from a game you (and your team) were expected to win. That being said, had you won, you would have only received 1 point. The system is saying you are playing the people you’re supposed to or people who you are expected to win against.