Webster's 1913 Dictionary

Loath´ing

n.        1.        Extreme disgust; a feeling of aversion, nausea, abhorrence, or detestation.

This is not a word that would usually be used in a music review or discussion, because playing music does not really evoke any of these things--it is hyperbole, and it's use would suggest an intent to insult, bellittle, and denigrate the performers work.