You clearly have more issues than everyone else, as I have never ever heard of a car revving at 4,000 as you want to park. And if you have read any of my other posts then you know I did have the same issues, yes mine does rev to 4,000, but a quick release of the accelerator or drop down a mile on cruise and it goes down to 2,000 or less, and generally stays there. can you advise how you know what % you have on your battery as there is no way of getting that on my car, and even the dealer says there is no real way to know how much is in the battery.
Revving whilst going up a slope is normal, and in every case, when you put your foot on the brake the revs drop if yours is not then you have some serious issues with your car, either stp driving it and get taken to a dealer or speak to the ASAP. as clearly you are driving a car that is NOT fit for being on the road.