What even is this?? I'm just about over this game.

I spent a full week with 2 toons level 45 and one level 44 and not being able to touch 90% to hit the next box and max the next one out before the new unlock. Then a new one comes out and I assumed I would have a chance to get there and provide progress yet after I can't even come close to my old score and they all die sooner so it all feels like a waste of time and effort. All are 4 or 5 star as well and I have a over 13mil gp account I've always stayed ahead without spending now it has become impossible to even attempt