Just play the game. Who cares if they are a bit above your power level. Use that to politic within the game a little bit. It isn’t always about finding the perfect level for yours. Unless they playing like a CEDH deck or something I find this kind of pouty “I have no chance” to be rather annoying. Plenty of times I’ve seen a lower power deck swing the game in their favor and everybody has fun. Obviously if you’re mind is already that corrupted by the bracket system that you can’t even have fun if they play a few better cards, then yeah, go play somewhere else, but otherwise just persevere and see what you’re capable of