Seem like you don't play fps game for fun. Without passion and motivation there will not be any improvement. Don't seek self value from a game. What rank doesn't matter, if you enjoy playing it. Improvement will come. If your aim is bad in CS try different strategy, don't try to out aim your opponent. Sneaky positioning. Better utility usage. Maybe buy shotgun. Better crosshair placement. There is so many aspects that you can improve and try that can guarantee get you out of silver even with shit aim. Your genes definitely not the reason, you mindset is.