Bro is complaining to a Completely Free Game.
Why should free of charge be free of criticism? I cannot see how those two relate. Only through valid criticism can a product improve. Unless you don't want this to improve. In which case, fair enough, but then the free part makes no sense how it comes to the picture? I'm so lost, man, help me understand your... ah... whatever you use instead of a train of thought?
You're right, constructive criticism and feedback are very important and help me improve. The issue he is pointing out is that saying "development is slow" is not helpful and doesn't change anything. It's a complaint. A valid complaint, because it's true, but it is not going to help me improve anything, or make an update come out faster.