> I don't understand why Oracle is hated more on HN than other large companies.

My personal opinion is that HN and the tech/genera community treat it as more as being a lawyer company (or having a very large amount of lawyers in general) and actively hostile to many aspects of tech.

It has very Microsoft-y vibes (minus Github/any goodwill that Microsoft has ever earned or past nostalgia like windows xp/7) while at the same time as @trentor said, they killed sun so they actively harmed the nostalgia aspects/goodwill (ironic how both of it is about Operating systems and for all its faults of Microsoft, they have handled the nostalgia part much better than Oracle)