At the scale of hundreds of engineers working on tens of codebases, who hasn't?
That's my dispute with your position - it's flatly generalising and characterising ALL our work as if it was our least successful work. By all means, call us out on our mistakes. But if you think everything we have ever done was hopeless, then you must have some theory about why so much of what we do has in fact been widely adopted. Surely you can see how fragile your own arguments must be if they are at odds with some clear data.
I like challenges and criticism; it helps us get better. I know we have made mistakes, that helps us get better too. I respect people who have differences of opinion on what needs doing, or how it needs to be done. Why not take the opportunity to become a counterpart in a rich discussion, rather than a one-dimensional anti-everything-Canonical mouthpiece?
We killed Unity for three reasons. First, I ran out of money to fund it. That was rough. Second, we built some very shoddy pieces in that codebase (though we also had some teams that did amazing work). That was sad and taught me a hard lesson. Third, we were the fourth horse in a two horse race, and the telco and ISV ecosystems were clearly not going to engage.
I agree with you - the vision of Unity was and still is beautiful. It's probably right - convergence between phones and tablets and laptops is the future for laptops. I think it's fantastic that a small but feisty community continues to work with that code. I was therefor, like you, completely disappointed to fail.
But why hate on me, and Canonical, when we literally put everything we had on the line for that vision, but screwed up? Why be an ass to the sorts of people who are willing to put every ounce of strength they have into something that you really wanted to see succeed? We failed because we made mistakes, yes, but for heavens sake recognise an ally when you see one, even if they make mistakes.