My least favourite technical support calls were with people who didn’t know their own interface and I was having to direct them, blind, to get the information and do the diagnostics I needed.

There were at least a couple of times where I had to ask the customer to describe literally everything they saw on the screen starting at the top left and working their way down.

I sometimes pretend to be one of those people when I get tech support scammers on the phone because I know how tortuous it is.