There are a few girls I used to work with on my college newspaper and they seriously had the worst attitude.
They were always negative and temperamental. They were very unprofessional with how mean, rude and downright nasty they behaved.
And they would call me unprofessional for laughing, socializing and having a good time while working. And guess what? I am in the professional working world and people laugh, talk and have a good time. Being a sour puss and negative is actually not accepted.
I hope they realize this one day and start having a better attitude. But I doubt that will happen any time soon because our advisor always makes excuses for their behavior and it’s disgusting.