Supposedly, Bob does not feed of audience energy. Maybe 10 years ago that would ring true. But, after going to 4 shows in the past year, I believe that is not true. I understand people expect every show they see to be the best one they will ever see, but there is no way that is even close to being possible. People complain if Bob isn't touring.
People complain about a new album.
Please, give the guy some slack, and just be happy with what is put in front of you. Bob is definitely not RUDE to his fans. He may come off as grumpy or annoyed sometimes, but he really is not. And if and when he is not in the best of moods, I think a person is allowed to feel this way. I have personally never seen Bob give anybody the cold shoulder at any of the 4 shows I've been to.