To my limited knowledge. EAC (Easy Anti Cheat) is Linux compatible, it just has a setting that needs to be toggled by the game devs and pushed out in an update.

Pirating a software still shows a company that there is interest in it. They will only know they are screwed when people stop buying and stop pirating

I use Eternity as well, but with the instance reddthat.com as such my saved posts work fine. Maybe try the web page for your instance to see if they work there?

Note down every tool you use in windows and use alternativeto.net to find linux alternatives for them. Thats what I did, saved me what you are going through. Everytime I tried to switch usinf a sifferent method I just ended up using Windows to not deal with the “pain point” of switching