

Try finding out if it received an IP address, if the driver is loaded or if there are any error messages in dmesg
. You might also want to give more information. Which ethernet card? Which version of Linux are you running? And there seem to be some similar reports on Reddit and in some Linux forums. I couldn’t find a solution, though. Maybe you just want to buy a cheap new network card.
I run Windows software such as games with Proton, I used Wine before. The frontend to launch it doesn’t matter a lot to me. Lutris, Bottles, Steam… they mostly all work. But honestly, I don’t pirate many games these days. I’m more for older games and since we got Steam sales and Humble Bundles, I get a lot of them there. At least the Windows games. I haven’t found a legal source for old console games, but we have a lot of emulators for N64, PSP, Arcade machines … as well. And great frontends like Emulationstation.