I can't find a metal keyboard+mouse.

A metal keyboard+trackball only seems available as a big industrial device for kiosks, that costs hundreds of dollars.

I can't find a pre-made all-metal video game controller. Not xbox, not playstation, none. Best they can do is metal case with plastic buttons.

You used to be able to get a laptop with all metal and glass case, screen, keyboard, and touchpad. Not anymore. Instead of progressing to replace the plastic in the USB ports with glass/ceramic, all the designs decayed.

Either someone smart is trying to poison everyone, or everyone is just retarded, or both.