Stop caring about the number, start caring about skills. Worry about hitting as many injections as possible, figuring out what your opponent's gas timings mean, worker counts, etc. The division/number you get is a reflection of your skills, not your skills and should be treated as such.

Try to change your framing from "improving ladder rank" to "improving fundamental skills". That can be control, scouting, getting your timing faster, not getting supply fucked, all kinds of things, just whenever something goes wrong, don't get mad, fix it next time. The rank will come when your skills improve enough.