From the first result on Google:
The Wayland Display Server project was started by Red Hat developer Kristian Høgsberg in 2008
So yeah, I suspect Red Hat does in some way contribute to development. As I’m sure does Microsoft, Canonical etc.
None of this happens in a vacuum.
This is what I found:
Wayland is developed by a group of volunteers initially led by Kristian Høgsberg
I can’t deny that maybe some larger company allocated resources to the project, even if, to me, it seems like no large company is directly funding the project right now, and Kristian seems like he hasn’t really participated in the development of wayland for the past year or so. The fact remains that it’s a FOSS project and you aren’t a paying customer, so IMO it’s kinda ridiculous to complain about it not being perfect right away. Work on improving it if you think it’s so bad.