Pixelated graphics after january 2025 update despite ultra settings

ravensdior  Please disable Game Mode and Game Bar, both under Windows Settings > Gaming.

If that doesn't help, please set your monitor to run at 60 Hz rather than the current 144, and restart your computer. This not a proper fix, just an experiment, and you can revert to 144 Hz as soon as you see whether it helps.

The next step would be to do a clean uninstall and reinstall of the graphics driver, since your dxdiag lists one error having to do with the driver.  Here's how:

https://crinrict.com/blog/2019/02/clean-re-install-of-graphics-drivers-with-display-driver-uninstaller-ddu.html