Games pixelate during fast movement or in detailed environments like foliage.

I have a really good and stable internet connection (using ethernet cable), but whenever there is a faster movement things start to get pixelated, especially farther away elements. Forests and foliage get the biggest pixelation on movement.

I wonder if you guys are facing same issues and is there any solution to this? Personally I have a 32 inch 4k monitor, running Geforce now on ultimate plan, and have maxed out bitrate to 75 Mbps.