It doesn't reflect well, but also, is it not fairly par for the course from a BDFL type? Surely Linus Torvalds has said meaner things at some point on a listserv. Why does this guy get blasted for it? Because people still have generally positive sentiment towards Github? Just a day or 2 ago some other article was making similarly "ad hominem" attacks towards anonymous Youtube PMs, it got tons of upvotes and nobody clutched their pearls for the poor PMs. The Github/MS engineers who maintain actions (whose poor performance probably isn't even the result of any single individuals bad code), will be fine.
Seems like the HN mob is just as capricious as the author in deciding who gets as pass or not.