Yes, but then you need to go in and change out some of the mods that aren’t up-to-date, which for some users is intimidating.

I chose not to include them since they aren’t updated frequently, and in my experience often require the user to do some fiddling. If you’re experienced in setting up modpacks, then they are a decent starting point though.

I’ll save you all a click: https://flathub.org/apps/org.prismlauncher.PrismLauncher

Use either Midnight Controls, or Controlify if you want to use the gamepad. Midnight Controls has a Steam Deck profile built-in.

Your TV is playing a large part in the degraded visuals. It may be receiving a 720p signal from the Steam Deck, but it then needs to upscale that to whatever resolution your TV is displaying. Most TVs are hot garbage at doing this task, and will make your picture look washed out, or even pixelated.

If you aren’t using the Official Dock and Charger, then you need to make sure they’re delivering enough power for the Deck and any attached peripherals. USB-C is much more complex than previous generations, and not all docks/cables are created equal.

These are problems I’ve never encountered in my ~2 years of owning a Deck myself, but I can’t give you more feedback without knowing what specific Dock and Television you’re using.

Your client is still Windows Store exclusive? That’s a hard pass from me.