That is a horrible result to be honest.
Agreed, but lots of folks love the over-processed, over-manipulated, artificial look. Not me. Technology tries to make up for bad photo decisions a.k.a. overreaching amateur creativity.
The iPhone my primary camera and camera improvements are the reason I upgrade iPhones. So I say as a compliment that it is a reasonable point-and-shoot camera on a phone. And according to third party evaluations one of the better camera phones.
With that said, the HDR of the iPhone is great at what it's designed for. It sharpens pictures and gives you a bump where you need it or takes a bit out. At the park the other day I took a picture of my regrets, er, kid on the play equipment. The HDR made the solid block that was a chunk of the sky into a blue sky with some clouds. A 100% better picture and closer to what the eye sees.
So if you want to use your iPhone take a picture of your lucky lump of coal on a black velvet pedestal with a shaft of sunlight next to it shining on a snow globe then you're out of luck. Or you can get an app to create a Franken-photo. At that point you might as well include x-rays and long radio waves.