I fly United for work and was seated in a middle seat last minute. There were multiple issues: 1) one passenger seated next to me was of an above average size and took up not only the entire armrest but half of my seat as well. I was forced to be in physical contact with him the entire flight. This is a direct violation of “United Airlines Overweight Passengers” policy, in which the airline requires you to buy an extra seat if you do not comfortably fit in one 2) mask wearing was not enforced and my neighbors did not wear masks the majority of the flight. The captain even stated that he didn’t like masks during his pre-flight announcement. This was frankly an extremely disappointing experience especially in the midst of a still ongoing pandemic. I have upcoming international business class travel booked with United but am planning to look elsewhere for both personal and business travel if these issues are not addressed. These are not only customer experience issues but public safety issues as well.