Is world latency high, home latency high, or both? Also if you leave a ping running in the terminal (like to 1.1.1.) Is there a matching latency increase with when you see the performance drop?

I'm also playing WOW Forever on Linux but I'm doing so via Lutris and fiber. So it's definitely possible. Just need to figure out the bottleneck you're hitting.

Have you tried using a cellphone hotspot to see if the problem is on the starlink side? They may have congestion that you can't fix.

Maybe do a traceroute to the wow server and check what gives latency. It could just be bad service from Starlink which after all is a satellite link.

Last time I go a very wild issue with proton, I sent all the proton logs to an AI, it honestly found the issue I had (my ISP router had failed to setup IPv6). All my game starting in steam would take a minimum of 30sec to stary. It was proton trying to download ressources over IPv6 and long timeouts.

Also if you are on Linux you need to say what distribution ypi are using. Alpine or cachyos is a very different environment.

How did you install the launcher? Heroic Games Launcher? Lutris? Bottles? Raw Wine?

I've been playing on steam OS (steam deck) through Lutris, and I'm not seeing any lag from that side of things. Performance was awful until I turned some settings down, but that's hardware rather than lag.

My guess would be an issue with your network or ISP.

Try doing A/B testing with the in game network settings.

the actual SteamOS is probaby not a good system to use for your PC. I would suggest using a distro that focus on gaming. The SteamOS is focused on the SteamDeck

Check out this page for a good list of gaming distros. https://distro.watch/distros/category/gaming

I turned my friend onto Pop and he used it for a bit and then went to something else but he has stayed on Linux so I consider that a great win and a good starting distro for a newbie. It has good nvidia support out of the box.

I use arch and have built it from the ground up, but I would not recommend that to a newbie. But if you get confident with linux and want to maximize your potential, arch is the way to do it