The only actionable complaint in your whole rant is that it is a resource hog. For reference on my system all the processes with "unity" in the name take about 210 of RAM (with a dozen windows open), a negligible amount for a modern computer or phone even.
It took me about 3 seconds to figure out click the menu button and type what I want. That really is the largest user facing feature, and its a common one with other main menu based OS UIs.
For the people I have put in front of it (about 5), all but one (my technophobic grandmother and never understood any UI, still has a time with the very concept of files and folders) figured it out quickly and rarely ask me questions. The most common questions is how to install some windows program.
You lack of concrete examples and its conflict with my experience leads me to believe you are exaggerating.
In my experience it is true that Unity struggles on older computers, or perhaps where the graphics driver situation isn't great. I've had a lot of installations where the dock takes 5-10 seconds to load. Agree with you about ease of use though, people seem to pick it up quite quickly. For the basic functionality of opening and switching applications, people seem to pick it up almost immediately. Not quite the same for using the dock, but even so.
It took me about 3 seconds to figure out click the menu button and type what I want. That really is the largest user facing feature, and its a common one with other main menu based OS UIs.
For the people I have put in front of it (about 5), all but one (my technophobic grandmother and never understood any UI, still has a time with the very concept of files and folders) figured it out quickly and rarely ask me questions. The most common questions is how to install some windows program.
You lack of concrete examples and its conflict with my experience leads me to believe you are exaggerating.