I’ve played around a bit with Remotely (https://github.com/immense/Remotely) from what I’ve seen it’s great for when a family member needs some remote support, it also has persistent agents for some stuff. Personally for remote administration I LOVE Apache Guacamole, it’s super handy being able to use RDP/SSH/vnc/etc from a browser.

Edit: after reading the post it may not be what you’re looking for. I don’t think either of those would be good from an FPS standpoint.

Jitsi or Element call

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Just a quick screenshare? Probably Screensy

I use rustdesk for remote desktop. Screen sharing is usually on zoom as it’s what my workplace uses.