I like to joke about what sort of idiot designs a round connector that is keyed, the worst of both worlds. Now, a round keyed connector is not necessarily a bad thing, the round shell can be very strong, but the ps/2 mini-din went too far. the shell was too small and the key not assertive enough. It was a bad connector.

The worst I have seen was an old ati all-in-wonder I had where the video input ports were on a dongle with a ps/2-like minidin but high density, with about 10 pins. It only took two insertion operations before I resolved to do everything in my power to never unplug it again. getting all those thin pins aligned was basically impossible.

I actually had to fact-check myself because I remember that infernal connector having about 20 or 30 pins, But I looked it up and it "only" had 10.

The worst connector IMO is the HDMI connector. I run the mediatec at an university and the amount of well-shielded cable I have to throw into the bin each semester because yet snother perdon levered off that plug is mindboggling.

On top of that, HDMI tries to be to much and do too much