Libertarianism original referd to anarchism actually. The modern usage of ultra-capitalist nonsense comes from people intentionally redefining the word cause they were mad that Liberalism no longer referd to what they were doing

It’s not nearly as hard as it seems, but you do have to be willing to search around Google for a bit and things might take a few tries to get working. Steam has an option in their compatibility settings to run windows games through Proton that has worked well for me, but I only really play smaller single player games. Can’t vouch for how well it works for multi-player stuff. Also I’m using Manjaro (based on Arch Linux) not sure if it works the same for all distributions.