>>1866453
Playing underleveled cards on ladder is an exercise in misery. After exercising in said misery for too long, I started to play whatever special modes there are until I have enough materials to level up my deck to at or above the average for my arena and then I could quite easily shred through arenas that used to be painful grinds.
Everyone else in midladder is seething, but the only counter to f2p overleveling is p2p overleveling, at which point neither of you will even be on the same arenas for very long.