United Airlines has horrible management that couldn't care less about its employees. To them, everybody is expandable and is treated as such. They set unrealistic goals then yell at us when we don't manage to do everything - when it was impossible to do in the given time as it is!
And if you don't like to be treated like trash? They'll just point you to the door since there are always enough unemployed people to come in and take your place. And if they complain they receive the same treatment. No wonder this company is always hiring, considering how many people are forced out constantly.