C6k 65 fonts flicker

I having this tv over an year, im using it with my gaming pc (5070ti, 4k and g-sync enable) and when i scroll in sites or in windows, especially when the background is black, i see the fonts quickly flicker with every move. i turned off every motion/backlight/local light setting.

and in general, my eyes are very dry/irritate with this tv and i cant find comfortable settings. I dont like high brightness, my settings are: brightness at 60, contrast at 20, and color at 3 (warm).

anyway to fix it? maybe to disable g-sync?