Meta: hacker news is known for this, but it's really not personal (modulo very few mean folks). People have an adversarial mindset and will poke holes in everything, even things that are awesome. If the biggest critique against your project is the font (superficial) you can interpret is as an absence of more fundamental criticism.

Fonts and fancy looking things in particular tend to be critizised extra hard if it interferes with accessibility or scroll (scroll jacking comes with capital punishment in the hacker news universe). If you want 0 critique the safest option is #000 Times New Roman on #fff background. Then you will please the hacker news zeitgeist (at the expense of everyone else).