How do you to get to 2000+ OTB Rating?

You need to be able to find out why moves are bad instead of just saying they are bad. I believe 24. Bd4(??) tosses the game away, leaving you with a bad bishop versus a good one. Even this might have been fixed with a timely b4 though
Hitting 2000 otb for me was just doing a ton of tactical puzzles and reading Reasses your Chess.