wht is the difference between good and bad sound ?

is it all subjective ? is sound quality dependent upon the ear of the beholder, or are there standards for judgment ?

in essence, if one does not like the sound is it bad sound, and cobnversely, if one likes the sound then it is good sound ?

does this also apply to components as well, i.e., if one does not like the contribution a component makes to the sound of a stereo system then that component is a bad component ?