just take time to get used to it, it's not an "improve ur skilz overnight" thing, but you will play better in the long run, give it a week or so. Also lower your mouse sensitivity if you haven't already, mines on 2.16 or something, again it will feel really weird at first but stick with it and your accuracy will shoot up, trust me
and to r_gamma 2 in console, makes it brighters and easier to see, you might need to change it back to 1 on snowy maps incase you get blinded but again it will improve your play :>
that's pretty much all I do, no time for these fancy cfgs ^^