hello
Losing 130 points or 15 games net
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1st. I would recommend you look at 1.e4 and 1.d4 openings. look at the piece placements on those. If you have your pieces on good squares out of the opening, you will probably have a better middlegame. 2nd. tactics tactics tactics :) Chess.com and other sites have tactics puzzles. It will improve pattern recognition and board vision which will make your overall game better. just my opinion on what might help
After getting to and high score of rapid 1324 I have tilting to an low of 1199 in 2 days, I have dropping tactics everywhere and losing on 4 or 7 streaks of losses/draws. I was using the Bird's eye opening and dutch defense with success, but have been really struggling. Are there more information on the f pawns setups (I lose later because of fuzzy blunders; but theory helps a bit too) other than the pay for tutorials and random youtube vids that shows like some weird trap that only works when your opponent blunders