I don't know - I suspect Wendell was just as much of an ass during his own season but the show edited out his worst behavior knowing he was going to win. No reason to do so now.
I don’t see why they would care to go through that trouble. It’s not like the “villain” has never won Survivor. After all, it’s a show that’s largely built around manipulating and backstabbing people.
I just think what we’re seeing now from Wendell is a combination of his win going to his head, and also that some fans/viewers felt Dom played the more aggressive and in your face game between the two. Meaning they felt he was more deserving of the win.
And so I think this time Wendell is choosing to play a more openly aggressive, in your face game. As I said, we did see signs of his show-boating and arrogance during his original season.
But I think back then he wisely chose to play the low-key game, where he tried to get along with everyone and keep most of his thoughts to himself, especially at tribal council.