No, you shouldn't have to turn everything to it's lowest setting. You might have to mess with push, but that should be it.
Here's how your OP came across: Tbe Genius told me to do certain things, since he considered my battery to be normal. I refused, got upset, and the Genius gave me a new phone anyway.
With your additional info after the OP. obviously there was more to it and the Genius was wrong. Can you see why people might think less of your OP with the info originally given?
At any rate, it couldn't have been horrible or you wouldn't have got a new phone.
Yep I see your point.