I too install Linux Mint, though Fedora Silverblue and Kinote is another good alternative.

Sorry to hear that. Ubisoft Connect has been hit or miss for me. On my intel machine it works fine, on my nvidia machine the menu was just a black box which failed to or loaded so slowly that it was unusable. My only advice is to use the latest Proton/Wine-GE/Proton-GE and wait for updates from Ubisoft. This is all unofficial so having it work at all is a miracle.

I’m running it the latest Linux Mint running Lutris installed from their official deb file.

I had an issue with connect and the recent update fixed it for me. By if it’s the same issue I had, try running in Wayland if your using x11. Or go back to x11 if you are in Wayland.