The higher ranked players are playing all 3 mods and have way higher elo on their top one, your flat elo in bigshitdojo wont be helping and you're a good few points off the current "average" for them.

At the moment you'd be needing a 1605->1610 average or better across all 3 to break into the top 20, and around 1615 average to hit the top 10.