I'm sure it's true, all I'm saying is that if you reach the point of walking away, just walk away. A list of grievances at that point is just going to be seen as a parting shot rather than having any real chance of motivating change.
I think the tone of the article was pretty stoic and so I didn't take it as "whining". I believe he just sees no future in an ever growing Debian bureaucracy and decided to voice the reason he is moving on. I've been with Debian since it's inception and can relate to what he is seeing.
But it probably does have a better chance of motivating change and maybe you are still trying to help. Obviously there are different ways to air your grievances, privately might be better, sure. I'm not sure if you are advocating for leaving without even giving some reasons in private. That to me would be an actively unhelpful way to leave.