I think i know where the issue is, did some testing and realized that this stuttering happens whenever the client has heavy interaction with the server, the frames take a huge dip.
How did i realise this? simple, when i start a local game, the frames are way more stable than when i am in a pvp server, and even on a local server you realise that whenever there is too much communication between the server and the client (e.g. when there is a respawn wave, or when a airstrike is called, also happens when there are many firefight happening at the same time in close proximity, etc.)
My specs are as follows:
I7 7700k 4.2ghz
16GB RAM DDR3 1600mhz
Common Samdisk HDD
Well thats what i found out, didn't use a presise methodology for those tests, but i hope that helps.
PS: sorry for any typos, english is not my first language.