Especially DX12 giving so much more control has actually backfired in a lot of instances, because game developers don't treat PCs with the same optimization care as they do consoles. Consoles have standards (and reject bad builds), for PC you can always pull a Todd Howard and tell users to upgrade to compensate for their misuse of the APIs.
Windows has traction by market saturation, not the technical merit of their Graphics API.
It's merit is utterly irrelevant. It's good enough, and good enough with other avenues of investment win over "the greatest thing of all time" every single time.
Apple told game devs on Macs to GTFO, and this is the result.
Did anyone else expect any other outcome?