Earlier quoted context omitted.
my understanding is that these conditions apply to people in the EU, i.e. that EU residents must be able to delete their content from HN (but HN has no obligation to non-EU residents)
I haven't researched that particular point, but I'm not sure that your HN comments qualify as "personal data" under the GDPR (they'd need to personally identify you).
Also things like deletion, takeout and consent/opt-out need to be supported (provided that HN falls under GDPR).