Got a new monitor recently and experienced this so mentioning it here as a heads up to anyone else who might be affected by it. Not AoC specific, this affected all games since it is a hardware/drivers issue. Colors looked washed out, blacks weren't deep and dark enough, screen had a bleached look due to the way Nvidia/AMD treat connections via a HDMI cable. This link details some solutions if you're experiencing this:

https://pcmonitors.info/articles/cor...-and-amd-gpus/

For me simply switching from a HDMI to a DVI cable fixed it completely.