@FischerSimul can't help you with anti, but for atomic?
check out these atomic puzzles
chessvariants.training/Puzzle/Atomiclearn the common opening tricks if you haven't already, and make sure you know how to play atomic endgames.
if you want, try playing wacky openings like 1. nf3 2. d4 instead of nf3, e3 (because its boring and overused imo)
you only have played 75 atomic games, so to improve you need to play a lot more games. Most atomic knowledge can only be learned and ingrained in your mind by playing many, many games.