ANother thing that pi$$es me off is certain stereo systems that have reverb and eq adjustments. Or 'graphic equalisers' that screw with the sound.
If I want reverb in a song, I put it in. Yet one of these machines can totally screw up the intent and in many cases ruin a tune. The "ambience" option turns up the left and right sides, and turns down the middle. Did you know that? Now, if you have a record where it's only the reverbs on the sides great. It sounds more "ambient" But if you have instruments hard panned, you end up loosing the centre panned vocal, snare, kick etc. WTF???
About ten years ago I was making a record with a guy doing testing for Roland. They were talking to him about the concept of having your CD player register midi signal, so you could change the keyboard sounds on a song for example.
Unbelievable. What is the frigging point? People bleed over sound selections.
However there is hope for the world.

Some people like to find out what speakers an album was mixed or mastered on, so they can buy them to hear it exactly as intended (for speakers are all different)