Ah, musical annoyances: composers who wrote music in silly keys and used alto clef for brass instruments (looking at you, Dvorak)!
I can manage silly keys because I've been practising Phantom music (my signature gives that away slightly), a disproportionate amount of which is in D flat. But given I can't manage bass clef, I think alto or tenor would blow my tiny mind!
Further annoyance: music that has guitar chords in the wrong key. Again, being a non-guitarist, I don't know the technical terms, but one version of
Slane that I have the music for has the tune in E flat and guitar chords in D. I did actually try playing it like that just for fun and I found it so uncomfortable that I stopped halfway through, so at least I'm not totally tone deaf.
Further further annoyance: electric pianos that have a "transpose" function, so you can, say, play "In Christ Alone" and go up from E flat to E for the last verse while still playing the same keys as you would for E flat. It's a brilliant idea in theory, especially for people like me who can't transpose as we go, but it is so off-putting playing in E flat and hearing notes that are decidedly not in E flat!
Further further further annoyance: hymnbooks that transpose some hymns into easier-to-sing keys but not others. It's dreadfully annoying having
Salley Gardens transposed down to C despite the fact that it only goes up to a top E if played in D, but not having "I Am The Bread Of Life" transposed down into A, when it goes up to a top F in B flat (top E is usually considered the upper limit for congregations in my experience, although some modern music that is designed for a worship band can go higher).
I would also include rap music on my list of annoyances (can't remember whether I've already done so

) but I'm going to be seeing a friend who's a rapper soon and I don't want him to murder me!