Same thing happened to 20K in that is was hot, smelly, cramped and the audio seldom worked properly. Not only was it very uncomfortable, but it was boring as well. It ran for over 20 years and became an embarrassment in its last years. Thank goodness that WDW had the common sense to remove 20K.
When my sister took me to my first Disney World trip this past month she told me she HATED 20K! She went on it with her family and it was cramped, hot, boring and gave her claustophobia and a panic attack but her husband "let one out" and it was worse than Figment's stink could ever be!. To her, New Fantasyland was a good move on Disney's part.