That’s unfortunate to hear. I doubt anything will compete with Steam with all the things you want. People need to choose to put value where it really matters and have some inconveniences. Pirating certainly won’t get you what you want. Supporting DRM free services (and the games devs) will do more good. You could download your GoG games through the Heroic launcher and it’ll use wine proton (or whatever it’s called). Also Nexus mods has a new mod manager that’ll work on Linux but it’s only in alpha stage currently.