double click on an icon (too slowly, with a bit too much pressure on the left mouse button, as if that made a difference, probably having single clicked to select first, just in case

I do that.
I use KDE.
I am a programmer.

Also, I make directories with the correct capitalisations for the project names before going inside them and running git clone, which makes another directory in small letters.

Also, when I make header files matching class names, I capitalise them same as the class name. That messes up stuff for some others, sometimes. I like it.