None of those benefits of Ubuntu that you enjoy express relate to the issue of copyright assignment for contributions to (A/L)GPL'd codebases to for-profit entities such as Canonical.
A disagreement with Shuttleworth over this issue is not an attack on Ubuntu or the Ubuntu community. A refusal to sign Canonical's contributor disagreement is not a disavowal of the Ubuntu CoC or the Ubuntu community ethos.
Don't let your enthusiasm for Ubuntu and for the Ubuntu community model cloud your judgment about the issues here concerning the balance between the interests of for-profit entities and the interests of the larger ecosystem with regard to the importance of a shared commons of peer co-development. These are really important issues for the overall ecosystem that go well beyond simple distribution tribalism.