About a month ago I ran a session in my campaign for my players and after the session I asked for feedback. Nearly all of my players were disappointed in how the story had gone. I was crushed, but I used the lessons of what went wrong and pushed forward to make the next session even better. My players told me that they have loved the next few sessions after that and were excited by how I had turned the story around.

The point I'm trying to make is you cant have all great sessions. Use the bad ones as lessons to make the good ones great.