Sounds like he was very skilled and continuously getting better -- which is of course impressive. At the same time, his overall life story turns out to be tragic. Two choice quotes from the article really jumped out for me:
> Ungar told ESPN TV... that the 1980 WSOP was the first time he had ever played a Texas hold'em tournament. Poker legend Doyle Brunson remarked that it was the first time he had seen a player improve as the tournament went on.
> Ungar is regarded by many poker analysts and insiders as one of the greatest pure-talent players ever to play the game. But on the topic of his life, Stu’s long term friend Mike Sexton said “In the game of life, Stu Ungar was a loser.”
