"The devs of x11" is a wide category, considering how many X11 devs weren't even born when X11 was first written. Plenty of X11 devs objected to Wayland and tried to patch X11, but when half the devs decide they want to write a replacement and put the original into maintenance-mode, there's not much you can do.

and failed to learn any lesson from X11

Yeah, no, the X11 devs made pretty much all the wrong tradeoffs for me.