90%+ challenge battles (mostly unwinnable)

I'm having a similar problem now @EA_dance210. It's gotten so bad that I honestly think I'm going to have to quit playing, because it's no longer fun. Despite trying to change my tactics and strategies, my win rate has sunk to a low 20% in Diamond after the season reset. Prior to the season end I was able to hold a decent 50% in low Masters. I have no idea what changed with the matchmaking but whatever it was it's legitimately sucked all of the fun out of the game, and I'm beginning to regret having spent money on diamonds.