I just switched over to using heroic launcher from lutris, its prettier and a smoother setup IMO. I have had issues as well installing some games from fitgirl, the install always failed. However they would install on windows just fine. So I did that then copied over the install files to my Linux hard drive and setup them up in heroic launcher.
I've only had to do this with 3 games from fitgirl, maybe I'm missing something but I could not get these 3 games to install on linux. This is why I keep a hard drive with windows installed on it :)
I'm actually in the process of switching over from docker to podman. Its definitely a learning curve, ie. Setting up systems integration etc.
I do love it but its been a bit of a pain, for instance I'm still trying to figure out the errors I'm getting when trying to deploy my matrix and vikunja containers, I'm getting permission errors and can't find dB errors. I k ow little about podman right now but I would definitely recommend it since it is open source and runs rootless by deafult.