An interesting question. I have no idea what advice the Buddha might have given to someone in this situation. Since we have only the Dhamma to guide us as to what the Teacher would say, we might start with Right View. How does this experience equate with not-self, with impermanence, and with dukkha?
These experiences are part of a process. We experience the harm to ourselves, but this this disheartened feeling is one that derives from a sense of self, ie “my feelings are hurt.” “I am criticized.” Yet, these events are all part of a conditioned process. The boss acts this way because she is the product of her own conditioning, and her actions derive from this. As Ajahn Chah once said, “if someone calls you a dog, look at your bottom and see if you have a tail. If you don’t have a tail, you’re not a dog.” So, don’t take the actions of your boss to heart. Try to appreciate the causes and conditions that lead to this event.
Next,. these events are impermanent. All things that arise will pass away. As Ajahn Brahm has reminded, “this too will pass.” So let go of the idea that the situation is permanent or unfixable. In time, things will get better, or worse. As things get processed, meditate to cultivate a clear mind, and try to gain insight into what the best reactions to the situation might be. Things will change, for sure.
Finally, this dukkha, this upset, this disappointment, is inevitable. Don’t cling to the idea that you deserve better, or that “my life is unfair.” Practice the path, and trust that in the end, as the processes play themselves out, that things will be OK. Stuff happens, as it is with all of us that swim in this sea of samsara. Adhere to the pathway out of suffering, the 8fold path, and trust that all will work out as best as it can be.
I’m guessing that if the Buddha was asked this question, he’d be silent. Naturally, I have some gibberish to contribute, and I hope other kalyana mitta here do better with this question than I have… 
