Plenty of people like Unity, it's just that the naysayers are super-vocal about it. Mir was an attempt to meld mobile and desktop at a time when mobile still hadn't really settled down - it was a bold experiment that didn't work. Amazon integration was another experiment that didn't work. They have tried a lot of things, some work, some don't.

But if ubuntu listened to the naysayers, there wouldn't be an ubuntu, and desktop linux would have nowhere near the user count it has today. Ubuntu drove a lot of development towards user-friendliness (directly and indirectly). Another of their success stories was Upstart simplifying service management, which was only unseated by Systemd (which started development nearly half a decade later with the benefit of hindsight).

It's so tiring hearing the constant bitchfest aimed at Ubuntu when they've done so much for the community, including significantly growing it. Yes, they've made some missteps, but so have all of the big players.