I think if you were to look at each of these rude/impatient nurses personally, even outside of work, you would find an unhappy, impatient, and rude PERSON. I doubt they're a happy person and a joy to be around except while at work, where they treat the people that need the most compassion, like crap ..... most likely, they're miserable and unhappy.
Don't get me wrong, nursing can be a rough job at times, which can test your patience. But, look at the majority of those that work in that office. If the majority of them are impatient and rude, then I'd move on because it's not like that everywhere.
Good luck and hang in there!