It was like one of the first games that became playable when proton first came out.

Are you using xorg or Wayland? If you’re using Wayland, try Discord canary, it should have better screen sharing support. Might solve your issue until it arrives in the normal Discord client.

Terminal emulators are pretty niche. I also tend to stick with what’s included with the DE. I’ve only used a third party terminal when I used gnome. Blackbox, as the one included in gnome at the time was still using gtk3.

Same, it just works.