I don't understand complaining about the "without warning". If the course was so bad there was no hope getting it to work, surely the best decision was to stop

I don't understand complaining about the "without warning". If the course was so bad there was no hope getting it to work, surely the best decision was to stop it. So how should they have killed it with a warning? Send an email with "we are going to close this class in 2 days"? Would that have been better?