I loathe the fact that my toner cartridge always runs out half way through a print run and you don’t spot it in time to cancel the rest of the print (well I rarely manage it anyway).
I dislike it intensely when people dismiss the importance of books or try to imply writing is easy (overlooking the fact it takes dedication, patience and persistence).
I also loathe it when I’m writing well but time gets in the way. I can and often do work into the small hours, which I am trying to rectify as I’ve nodded off at my desk more than once but my head buzzes with ideas (nice problem to have, definitely not complaining) and I wish my body/mental abilities could keep up with it all!