I've tried to be patient and give them a chance to fix the unbalanced Arena but they refuse to do anything about it. Im guessing that's how they make more money. They give you an unbalanced Arena with opponents several million more might than you so feel compelled to pay to compete but pay attention here, you will never be able to spend enough because they will always pair you with people 10 million might or more higher than you. It's a wild goose chase.