I'm guessing bot, since "It's just a chatbot with a pre-determined set of responses" is super wrong
Regardless, it does sound like an pessimistic hacker news commenter.
In other news: People discover interactive mirrors, and get freaked out!
Woof woof woof!
Wrong, but hilariously convincing as a hackernews-commenter-style post. If someone was given a load of hackernews comments and asked to find the one that was generated by a bot, who would look twice at that comment?