If you’re THE leading DE project at least try to accommodate those DE’s that depend on your code or meet with them to inform them well in advance and discuss the best options for those DE’s.
It’s always easy to say that other people should do more work to benefit others. Libawaita isn’t anything new. It was announced loads of times.
In other words, work together for the good of all users
That the current status isn’t what you want isn’t the same as not working together. Further, there’s usually a limited amount of time and attention.
Within Linux there’s loads and loads of opinions. Loads of different desktop environments. That complexity cost development time. Time that isn’t infinite. Again, it seems to easy to direct how others should spend their time and/or to argue that they aren’t doing enough for your liking.