can you post a pic with the lcd out of the phone? Its a little hard to tell exactly what is going on.
The first pic looks pretty normal
The second pic is exactly what you should see without the polarizer on it
The third pic looks like you have a new polarizer on it but it also looks like there was still a ton of debris on your LCD. I've never seen one look like that but white splotches on the bottom left and center right look like damage to the LCD itself from putting too much pressure on it.
You have to remember that the display is only .035" thick and mostly made of glass. They don't respond well to pressure and especially not after they have been heated up. I don't think you removed too many layers, I think you used too much force and also didn't clean off the LCD well enough. My guess is you tried to brute force the cleaning instead of using the proper chemicals.
One of these will get you back up and running:
iPhone 6s LCD Screen and Digitizer Full Assembly - Choice