Hello @SnowM46,
I wouldn’t categorise this as a FiveM client issue.
My theory is that it’s your PC specs that are the culprit. The server you’ve mentioned has dozens of GB worth of mods and usually has very high player numbers - all of this affects performance for the end user (in this case, you). Couple that information up with your PC specs, I can understand why your game is stuttering/lagging/glitching.
I would suggest joining different servers (preferably ones without many players and mods) to test the theory I mentioned above.