You can manually remove all of the previous drivers and their GL32 counterparts, your flatpaks will still run as long as you have the newest drivers.
I’m not sure why they don’t get caught by the --unused flag, but they are definitely not needed from the flatpaks I’ve tested with.
I second this, I also use arch (btw) on all of my personal computers, gaming rig, media machines; But when it comes to my work machine, it also runs Windows because it needs to.
I love Linux and want it to prosper. Hopefully one day windows specific software like that won’t be such a hurdle, but unfortunately it is; If your livelihood depends on it, you cannot afford to risk hard breaks in compatibility. There will be days where as a less experienced user, issues could take hours to fix.
If you get a secondary computer in the future that you only use for personal activities, that is when I would reconsider installing and learning Linux. It’s rewarding to learn, you have more control over your system and better privacy, but it takes time and effort.
To flash a windows USB you need woe USB. Full instructions are on the github. https://github.com/WoeUSB/WoeUSB-ng