I don't like Polymer guns because...
They complicated my life. I would have been happy with "metal" guns but not anymore.
I would like to see actual problems experienced with Polymer rather than personal biases based on unsubstantiated claims.
They caused many problems in my life. I was happy with 1911/Sig 226. The first time I held a Glock 17 I went, "Are you kidding me? Who would make a gun out of plastic? It's gotta be a passing fad". But that introduction in late 80s got me curious about polymer guns and things got complicated since.
I was happy shooting matches with 1911/226 and when I got faster stage times from a Glock 17 that I never shot before, I tried to dislike it saying, "But it's got poor trigger, grip is blocky, etc." but I ended up changing my match pistols to Glocks.
When 40-9 conversion barrels came out so I could shoot 9mm out of my 40S&W Glocks, I ended up having to sell G17/G19/G26 and replace them with G22/G23/G27 along with conversion barrels for all of them.
When I whined about poor ergonomics of Glocks and how I have to shift my grip to release the magazine, M&P40/45 and PT145 SA/DA solved the ergonomics issue with grip inserts and shorter reach to controls. Of course, I had to buy more pistols.
Yeah, I hate them because now I HAVE to factor them in whenever I consider a new pistol purchase. When my wife wanted a pocket 380, I had to buy another polymer gun (TCP 738). When I was considering a 10mm pistol, I could not ignore the Glock 20SF with shorter reach to trigger and softer recoil from polymer frame. Dang, now it's the next gun purchase I am planning on. And since I can shoot 40S&W with a conversion barrel, I would have to buy another conversion barrel too.
I hate polymer guns because they complicate my life.