I totally get the frustration here. I started using Ember when they were still SproutCore 2.0. I got used to the API then and as Ember matured and the API changed, of course I was frustrated. But you know what, with any new language, library, framework, whatever, there will be growing pains for everyone.
These guys have done an amazing job building something extremely powerful and we have yet to even scratch the surface of what is possible with Ember. It'll take time on their parts to keep the project progressing, and it'll take time on your part to learn it.
Would I prefer that there be a bunch of awesome example uses to help me along? Yes. That day will come, Ember is still a baby. For now, I am ok using their docs, SO, and Google to get me through.
If you're really stuck, why not utilize this board to post actual constructive questions for specific questions instead of just slamming these guys.
Just remember, these guys didn't have to build Ember. They don't have to keep improving it. They don't have to do anything but pay taxes and die. So next time you want to stone someone who has built something because they know the community would benefit from it, think twice.
Great job Ember Team! Thank you for all of your hard work!