I had a similar issue with the Nonsteamlaunchers script not working for me. For Epic, I ended up installing it manually as a non steam game with Proton GE and a Polygon guide I found. Haven’t tried to install Uplay yet but it’ll probably be the same as installing Epic launcher.

For the grey screen issue, this comment fixed it for me: https://www.reddit.com/r/SteamDeck/comments/182h59a/comment/kas5bre/?utm_source=share&utm_medium=mweb3x&utm_name=mweb3xcss&utm_term=1&utm_content=share_button

I definitely don’t regret it, but if I didn’t have the money sitting around to afford it, I definitely wouldn’t have bought it.

One thing my dad taught me was not to cheap out on something that you plan to use often and get the best you can afford (things like chairs, TV’s, cars, etc). I use my Deck like every other day so having things like a better screen, better wifi and battery life would give a better experience in my mind.