Earlier quoted context omitted.
You are sacrificing your objectivity, there is no reason other distros cannot be 'just as shiny' as Ubuntu or Mac OS. Furthermore it is horrible because Canonical has a history of secrecy and authoritarianism and they absolutely go against the spirit of open source software development.
If the "spirit of open-source software development" can't stand for distro maintainers to have strong control over what goes in their own distros, this open-source spirit sounds pretty authoritarian itself. If (for example) I want to maintain my own window manager for my distro and I provide the source under a free license but don't accept outside contributions into my own distribution, what is wrong with that? Isn't…
Most of them had contributed zero to Linux, so I don't know where this entitlement sense and emotional response comes from.
If you don't like it, go use whatever you want.