He certainly is. Remember, Time's Person of the Year isn't praise or a reward. There have been terrible people who have done horrific things to take that title. I have no doubt that Donald will prove to be one of those people in due time.
Person of the Year doesn't mean that they're praising him. Trump literally had more coverage of his campaign than any previous candidate in recent history. It makes sense, the word Trump was EVERYWHERE.
Person of the year is not about doing good it's about who was the most important person of the year for good or for bad and Trump (together with Hitler back then) is obviously the winner of this year