Demanding of both someone else's time and their money and acting entitled about it is not a "failing" of those being demanded of.

And of course it is their right to say whatever they think, but in my opinion it is of extremely poor character and will only reflect on them, not OpenSats.

Nobody is owed anything, not an explanation, not a thorough analysis of their project. Nothing.  Do you even comprehend how much time and energy it would take to do that?