A: Can you tell me your opinion about this? Please, be honest.
Me: Ok, I think you could do it in a different way, but let's talk about what you did and see how to make it better...
A: I don't think so, I think this is the best way to do it.
Me: Oh, OK.
A: Why are you always complaining about my job?
Me: Well, you just asked me, and I work on this too, so I thought...
A: I don't think you're collaborative enough with me!
Me [walking away]: Oh, OK...