Mr. Wolf! Sounds like you caught some GD "space" action, always hated that aspect/portion of their concerts. Think that just gave the rest of the band a chance to go back stage and indulge their extracurricular pharmacological appetites.
Like any band, there will be some stuff that just plain stinks but I still love the Beatles, not their really early stuff, I think from Rubber Soul on they really came into their own. Same with Zep, not all of it was great, still fond of them too, though may have OD'd a bit on it in high school