Imagine this scenario.
You are asked to do a favour. You are to carry out a certain task which needs to be done in a short space of time. You are very busy with a lot of other commitments, yet you oblige to help out. You get the task done, even though you are not thoroughly happy with it because of the time constraint. Then a few weeks later, you are called up on the pretext of a discussion. No agenda for discussion was given. Neither was any other information on the said discussion. It turns out the discussion was a meeting to assess the task that you did. The task was given to a so-called external expert to evaluate and comment. The expert presented his assessment. You are told that what you did was not good enough. The meeting was then concluded without you having any say or comment.
How would you feel?