A GSA was not fit to handle difficult guests finding it increasingly hard and complaining about them, and that is a clue to what will happen next. S(he) did not like how the frontend was understaffed where s(he) could not manage breaks or their own. Next s(he) became hostile toward other team members and team leads. S(he) walked off the job and out of the store a number of times only to return an hour or so later. S(he) ended up quitting because of difficult guests and team members. All I can say is that they were not a good influence, certainly not motivating, and it was much more pleasant to be rid of this walking time bomb. When you feel the need to explode... well you're not focusing on the challenge and what I see in that is that you did not want the challenge - you were a bad fit for a leadership position. When we complain about guests we are not looking for ways to provide reasonable to great guest service. I find such people NOT looking for good, instead they are looking for the next ball to drop. With that outlook they are a ticking time bomb that will sooner than later hit zero. It's hard for some to have a good outlook and attitude, I am included in that, yet if you catch yourself degrading, you can change your focus so that walking out is not much more that a passing thought.