2 bad experiences, not necessarily bad shows as such....
1) Zooropa Koln 1993, absolutely appalling sound/acoustics reduced so much of the show to dirge, & that was in GA.
2) Amsterdam Arena1, JT30 July 2019. Again appalling acoustics (I had been warned but did not heed the advice!) from expensive seats. Crowd were great though, and my video went into a multicam which does not sound as bad as my ears heard!)