All the parts you quoted make it non-free. Free software allows you to use and modify it for any purpose.

So proprietary

Needs a better name tho. How about Unilaunch?

You can see other people’s issues on ProtonDb https://www.protondb.com/app/485510

Basically no attacking with controller without workaround, movies not playing for some and performance/stability issues.

Lots of good games are still not working properly (e.g. Nioh), also modding support is very lacking and cumbersome.

Valve didn’t make this game. I continue to support Valve and devs who support Linux.

No tux, no bux

Hiding Magisk is just 1 click in the settings

You also need to hide the Magisk app and change its package name and block the banking apps in the Magisk settings.

On more exotic devices, you have to spoof your device ID as well https://github.com/Magisk-Modules-Repo/MagiskHidePropsConf

Use Magisk, it bypasses SafetyNet. No need for dual boot https://github.com/topjohnwu/Magisk

You must install the Universal SafetyNet Fix afterwards https://github.com/kdrag0n/safetynet-fix