YES. I already mentioned this but the HTC 10 on STOCK Software is NOT supposed to do this.
RETURN IT. It's a defective Autofocus module.
It should focus in millisecs wherever you move the camera to be pointing at. My second exchanged HTC 10 does NOT do this and focuses VERY fast, only perhaps slightly behind the the S7Edge I have. My first camera stayed BLURRY when focusing anywhere except like a few inches in front of the module. Almost like the focal distance was stuck.
By the looks of the thread, a huge batch of them went out defective.