It already has improved. You’re just very ignorant in your idealism. I’ve used it at home and for work for at least 6 years now and the problems have honestly been way less than expected for an X replacement. Screensharing was probably the biggest hurdle initially, but even that has worked for quite some time now. The last remaining issues are pretty much down to individual applications.
You could not write an operating system even remotely comparable to Linux in that time with the ressources the Wayland devs had available.