They're not haters. This is the type of discussion you should expect when discussing typography. It may seem like endless nit-picking, but it's the sum of nit-picking over all the tiny details that adds up to great typographical design.

I understand this type of thread doesn't really fit HN's "no gratuitous negativity" guideline, but IMO there's really no other way to constructively discuss typography. The whole field is made of attention to excruciatingly tiny details, but taken together, it adds up to great and beautiful design. It's one of the things I love about it.

Maybe note that none of the criticisms are entirely dismissive or unnecessarily harsh, but well-argumented, just about tiny details.