You confused me with your capitalization of the word 'cop'. At first, I thought it was an acronym.

While I agree that United doesn't always have the most friendly flight attendants, I think that there are multiple things at play in your list of events with add up to your impression, and reasons are not all the same.

For example, the washrooms incident - United was one of the two airlines involved in the September 11 tragedy. As a consequence, a culture of security, some might say paranoia, developed amongst the cabin crew. They tend to be quite strict about enforcing security rules. I do think your expectation that the flight attendant notify you when the washroom is free is a bit much. The FA has other duties than to monitor the washroom and there are signs which will let you know when it is free. These signs are normally visible throughout the cabin.

The Indian gentlemen who had the problem with the meal had nothing to do with security. This probably stems from the lack of exposure that many Americans have to non-native speakers of English. They haven't learned how to communicate effectively with those who don't speak the language well and get quickly frustrated with them.

Your Ambien story likely has a third reason. People who have taken Ambien can be difficult to wake. The flight attendant doesn't have time to cajole you endlessly into waking up while they are preparing the plane for landing. For all you know, the FA may have made several attempts to wake you unsuccessfully before the they resorted to the more aggressive attempt to deal with the problem.

All these taken together add up to a less than stellar performance by the cabin crew, but it does help to recognize the background of each of the activities and recognize that some may be excused more easily than others.