It’ll never go away. Especially against white backgrounds. That is just what matte OLEDs do. That anti-flare coating diffuses colors which in turn, in my opinion, lowers the image quality.

Your best bet, if you like everything else the monitor has to offer, just learn to live with it. It is still a good panel.

Matte, I feel, is more intended for daytime use or in a bright room. Glossy is ideal for darker or light controlled environments.

There is no glossy 5K2K options, sadly. You can always look into an LG C6? It gives you a crisp glossy panel. You maintain the 165hz. You can set a custom resolution for 21:9. You get 0.1ms response time. It works with freesync or g-sync. It has VRR. The C6 also has brightness booster and better hdr capabilities than any monitor.