Not sure about Modern, but I'm getting wrecked in Wild Diamond right now. I fear my Champion days might be behind me.
If I keep spending the first half of the season in Gold, I might have to put my max cards on the rental market, and rent some gold level cards instead.
Have you tried changing when you play? Choosing a slightly different time seems to make a difference for me.
This is a good idea, as the maxes rent for heaps, especially at the start of season as everyone is pushing for Champion.