Dear frustrating sort of supervisor,
Be more x is not useful feedback. You need to tell me what you want me to do not some vague abstract idea. If being x were something I naturally did well, you wouldn't have to tell me to be more x now would you? Also, I hate the whole indirect communication thing, feels like people are tattling on me instead of trying to help me. And if I tell you I need more information, saying you already gave me the information is not helpful. I found your information insufficient that is why I'm asking for more.
Dear internet,
Thank you for listening when I vent and for being a place I can say all the things I want to say but know it would not be wise to say in real life.