Rejection after an interview: what to do?

We have all been there at some point. These are the best things you can hear if you get rejected to receive a reason for rejection. It could not be an actual reason, but it is better than nothing.   "We have some reservations regarding your comments about your previous employer, as we value professionalism and respect in all workplace relationships."   "We believe that maintaining a polished appearance is important in our work environment, and we encourage a more professional presentation."