What is up with the aim 343?!?!?

I just don’t get why nobody (at least not many) is complaining about the aim in halo 5. It feels different than any halo or any game. It is like your sensitivity changes every 2 minutes. It usually happens in mid game like when you are on a streak.

I feel like 343 intentionally put this in the game so that u can not hit every shot. Sometimes i just run around with the smg or the AR because it is impossible to aim with the precision weapons. I do not know how to describe it but the aim feels very slobby and it also feels like ur sensitivity changes every minute like i said.

I would really appriciate it if anyone could give me some advice on how to fix this. I mean if it is not 343’s fault (which i dont belive) then it could be my xbox. But i bought a really good gaming monitor for halo5 and i still have these problems its crazy!!!