Ruby, that is not professional to say you would prefer someone else to close, someone who has worked a full day and who doesn't close or work nights. The supervisor closing probably did take it as a personal insult. If you don't understand how that is rude, please speak with your counselor/therapist. It's not a matter of some people taking offense to "everything". You continue to not take responsibility for your actions at work, over and over again. And you get yourself into trouble, over and over again as a result.