The specific error they are criticizing is extremely egregious, akin to builder declaring a house without a roof complete. “failing and deserving to be called a monkey” is a criticism being levied against a 0/100 level mistake, not a mere minor mistake as you are claiming.
While it might be desirable to use less colorful language, it is frankly challenging to express the sheer level of grossly incompetent organizational ineptitude on display here in a reviewed and delivered product actively causing negative customer impact for literal years which is trivially fixed and yet has been ignored.
Customers of Github should be infuriated that Github gleefully foists such utterly defective software upon them. It is hard to get that across in dispassionate writing.