I am starting this on the back of another thread about best live performances. How about bands/performers you loved and thought were going to be great live, only to be disappointed for one reason or another?
I will start:
Neil Young, Royal Albert Hall 2003. I love his music, absolute soundtrack of my later years at university, but this concert was unbelievable in its shitness. Half of it was some unlistenable concept album. Never felt the same about him after that.
Van Morrison, some concert at a stately home type of place, maybe fifteen years ago? (Have blocked out the details). The booze completely ran out before we got to the bar for the first time (and no, we weren't late, he hadnt even come on stage yet). I guess that wasn't Morrison's fault directly but you would think he would employ/contract people to make sure this doesn't happen. DH and I soberly listened to two songs then shared a look and left to find a pub.
Nina Simone, probably also Royal Albert Hall, some time in the 1990s. Sorry, I know she is dead now, and was a legend, but when you sit right over to one side of the stage, practically in the wings, for the whole show, completely hidden by the piano so only half the audience can see you, then you are going to pass off even your most ardent fans. I never even caught sight of her.
(Bob Dylan pissed me off at the Brixton Acedemy circa 1990 by never taking his hat off, so I never saw his face, but I forgave him because he is Bob Dylan, and at least I saw the rest of him).