have you ever noticed you are the only human in the overworld left? if you have, you probably haven't noticed that steve looks like he's frowning all the time because he is sad and lonely, he is the only survivor left, so that means the music represents steve's feelings steve is stuck in the overworld forever, he's died many times and he just keeps respawning steve is in immortal pain, not even dogs or ocelots could make him happy anymore, steve is just eternally suffering