I don't know exactly what changed. I learned a lot of utility lineups. Maybe that helped. I go into empty servers and practice smokes. I watch a lot of advice from Instagram people on how to peak corners, how to improve various mechanics in-game.
I guess each little piece of advice has helped. I am still too aggressive. I love being first onto site and I push too much when I should be behind cover.
This is just proof that if you implement small changes to your game (trust the advice of people better than you) then you can climb to a respectable ELO.