Yes, this is my point. My opponents get same % players with much lower cost than mine, or much better % player at the same cost as mine. Even I spend big money, I could still lose, so the best strategy is not to spend at all.
Another point is I earn less in L5. The opponents’ players are actually low % and easier to train and improve. I’d rather to be promoted to L6 and receive 2 star loss if Nord wants to balance me.