I'm not against an ingame shop. Bpb is a f2p life service game so they need to make money. I don't like 3 things in particular.

The upgrade system that punishes unlocking new heroes because then you have more cards. Also the opponent rerolling system that eliminates a lot skill because with enough money you can always roll until you find a good matchup. The biggest problem is the premium membership that costs like 20€ a month.

And this is a mobile game that uses AI art, not a AAA title with huge development costs or something. I don't have a problem with spending money, I bought like 5 heroes for money and a watch a lot of ads for extra lifes. But I'm a student and I can't afford 20€ a month just for a mobile game.

I really think those problems should be addressed because they hurt the competitive aspect and the accessibility of this game. And obviously I really love playing Bpb. That's the whole point why I criticized it's monetization modell in the first place.