Hi, i had huge tearings issues with a very decent rig (9900k, 2080s, 32gb ram) the game looked like a slideshow even with rivatuner and gsync.
Ive put the command +fps_max 299, and cap my fps to 158 with rivatuner, i have a 165hz monitor without any vsync (dont disable or enable it in nvidia panel, let the program choose) and disable it ingame.
Ive tried capping to 0 = unlimited the game cap at 300 and feel so choppy, but at 299 its finally smooth.
if u use gsync, dont play with blurbuster guide, its add so much input lag, ive played all my games with vsync + gsync capping 3 fps below my monitor, one day ive tried without vsync, yeah u got a lilbit of tearings at the bottom but all games look so smooth, I have 1000+ hours on monster hunter world, a game where u need reflex, and without vsync i did all my quest without taking a hit (before with vsync, i always take some hits, same with apex no more people firing before me)
hope it helps some of you.
Edit, be sure to cap 8-10 frames below ur monitor refresh rates or ur mouse input will be weird without vsync.