I think most anti-polymer feelings are more subjective or emotional than rational at this point.
Robert M. Pirsig was driven to the point of insanity attempting to define the word "quality". After his recovery, he stated that it was "the pursuit of excellence".
I grew up a long time ago when excellence meant precisely machined steel, handcrafted wood and supple leather. Well, times have changed. You can now have your firearms "crafted" out of fine polymer. Holsters can be made from tough synthetics. You can buy synthetic western boots made in China too but my name isn't on the waiting list.
If the value you place on a firearm is such that it is immaterial whether it is finely crafted or popped out of a mold, you know what to buy. If you place a high value on "the pursuit of excellence", you may have a fondness for finely crafted steel and wood. I don't want to own just another black gun. I want something that displays some personal values and personality.
I prefer metal guns. If I want to I can hard-chrome or plate them. I can bead blast them or have them coated with high technology finishes.
If I don't like my grips, I can change them. I can have fat grips or skinny grips; scrimshawed grips, ivory grips, antler or wood. I have choices.
It is not simply a matter of "hating" polymer guns or whether they are reliable or accurate. It is about the value that you, personally, place on your arms.
Me? I'm old and hard to get along with. Give me cold steel, fine hardwood and soft, supple leather any day.