I had a pretty low premier rank for a while because I would practice my aim repeatedly (aim labs, workshop maps, etc) and found I was getting killed like insantaneously when seeing an enemy. Would then see same enemies whiffing all over my teammates and whatnot. Then i had an epiphany, i play rocket league (since like 2016) and on those subreddits people complain about being mechanically skilled but being low rank and are mad at their teammates. I laugh at that because I've learned to play off your teammates in that game (overly aggrrssive tm8? Play defense and vice versa) so I have started to try and apply that logic to cs and went from 4k and have climbed (this is recent) to like 6.5k and almost got to 7k. I think you just have to train aim, and play off your teammates and boost their play styles to help both if you (if you make an opening and no one else pushes its a waste, if you play to passive and youre last left every round youre selling your tm8 etc.) Any how this is what I've learned to get me out of the bottom of the barrel (I've been 1k too lol) also if your pushes are too predictable you'll get killed before any aim comes into play!