IMO the whole: "I got XIM to make the switch to PC" is absurd. (I'm, not saying you're absurd not try to offend you) the idea is nonsense.
You know what is the best way to switch to PC?, just get a frikking gaming PC and play, that's it, grind it everybody has it.
OK you develop a crutch with the Aim Asssit, that's why in part, why some of PC gamers/Ximers we encourage to others to no use Aim Assist or reduce it as possible.
But even though if you haven't use any aim assist, is not going to be an easy change.
specially if you have a capable above 100fps gaming PC, there is a bunch of other factors:
On your end:
- Fastest almost no-input lag (present on consoles)
- Faster fluid gameplay, higher fps
- True native mouse tracking
- More complex keyboard bindings.
External:
- Potentially better servers
- Players with a very good aim
- More savy players (game understanding)
- Cheaters (hacks, aimbots, etc).
Did you guys know that is more easy to teach women to shoot and handle firearms that men?
The reason is, they don't have bad habits are clean. We as boys develop many by playing as a children with or hands, slingshots, nerfguns, etc.
So your memory muscle is mess up, fix it. Stop playing on console, don't go aimbooster, play the game you need to be good at and practice practice practice. Just find a right sensitivity, remove all mouse acceleration from your game, OS and go for it.
I suggest to stop to blame something else to your fuckkups, XIM didn't ruin you; you did it by relying on aim assist, by the same token you are the only one who can fix it. Go for it.
-That's right, I agree with everybody here: playing on low sensitivity will be easier for you to develop your aim.

Enjoy the ride!