I'm the Ubuntu Desktop manager, also known as the guy generally responsible for making sure Ubuntu works and works well. I wish I could address each and every issue listed here individually, but I can't. Suffice it to say, if you are having any issues, file a bug on Launchpad for Ubuntu, Unity or any other package and we'll make sure the right person is looking at the issue.
Some links to remember:
https://launchpad.net/ubuntu https://launchpad.net/unity and https://launchpad.net/unity-2d
On each page there is a 'report a bug' link on the upper right.
Or, if you experience a crash, you can report the bug at the command line by typing 'ubuntu-bug' and a series of prompts will walk you through the data collection.