Changing too many parts
You cannot identify the useful change.
RECOVERYReturn to a saved baseline and swap one component.
COMMON MISTAKES
Most beginner problems are not aim problems. They come from changing too much, reading too little, or testing the wrong thing.

You cannot identify the useful change.
Recoil, spread, reload, range, and mobility can make the full weapon harder to use.
A promising build disappears into later experiments.
Random fights produce a poor test and can cost the match.
A good build still loses when downtime is exposed.
Updates and playstyle differences can make a borrowed setup misleading.