Years ago I got a similar thing in gcc, me and one bunch of devs discussed an idea, I went away, polished, tested, then when it came to merge time someone else popped up and said the whole thing was a bad is and I should have done it all a different way.

People get to disagree of course, but it’s very depressing, you feel like you are wasting time you aren’t even getting paid for. I had previously made dozens of gcc patches and I never made another significant one after that again.