OMG, @protonprivacy has added support for WireGuard over TCP and WG over TLS (branded Stealth) to their Windows software!
And the changelog entry for such game changer version is "Bug fixes and performance improvements" — very descriptive 🤦
The source for this isn't yet available on their GitHub, but I hope it will soon. But what I'm interested in most is their fork of wireguard-go that works on normal non-Android Linux-systems so I can run it on my proxy and stop using my phone as a VPN box.