HN isn't one person, so I think you can blame the varied reactions on the origin and perspective of the article that the comment thread is hanging on, the relative quality of the arguments made in the particular comment being upvoted or downvoted, and the state of activity of particular groups either supporting or opposing TPP at that moment. The opposition nominally won at the point where Clinton renounced her support while Trump was an unstoppable juggernaut. After this final blow, the thread is largely centrist mourning and a bit of Trump-boosting because of his follow-through on a universally (in the US) popular promise.