Run Qubes

Run whatever OS environment you need, in its own instance. Run a virtual networking stack. Crosslink your environments as needed. Segregate your environments as needed. Create new environments as needed. Destroy them as needed. Expand your virtual infrastructure.

Experiment with BSD and then realize that TrueNAS Scale is the last NAS environment you'll ever need, and you didn't really want to spend time on BSD anyway. Expand your server and network infrastructure.

Run every environment. Realize that you actually have a lot to learn about Windows, especially server and AD forests, and all the stuff you've complained about is actually kind of petty next to the monolith of professional computing environment that Microsoft has built (and also keeps making unnecessary self-harming changes to, and wtf is with user CALs anyway?). Learn to do user and domain management for real. Then learn what the real problems with Microsoft are.

Experiment with Redox, then give up and do something more useful with your time.

Install Xen Orchestra on some cheap secondhand Dell server you bought off eBay. Run a proper VM cloud environment. Run everything on top of it. Create your own VM golden images for the environments you use most often. Your personal computer doesn't even have a local OS installed anymore, it's just a terminal that runs whichever VM you need from your Xen server at the moment. Reject limitations.

OS elitism is for the weak and the simple. Enlightenment is understanding the strengths and weaknesses of each platform, and getting the best from all of them.