Well, yes, the scenario you just described is offensive to me. The objective of the game is to win, not to draw with two friends. Contrary to popular belief I am not a big stabber, and I struggle myself with betrayal, particularly of a game long ally. At the same time, anyone who doesn't even explore the opportunity to win, and enters a game with an objective of taking a western triple to a three player draw is pretty much cheating. So, yes, that's offensive.
I guess as usual you've missed the point, which was a rather simple one. Maybe your Game of Thrones character can be Ser Dontas.
Diplomacy is a game designed to be won by one person, and there are no points awarded for second place. Understanding this concept is what makes Diplomacy such a great game, and coincidentally what made Survivor a phenomenon. As they say in Highlander, "There can be only one." While draws are a reality of the game, they happen too frequently around here, with far too many players in them, which is probably why so many folks think a survivor tournament would be a great idea. What is the point of playing a game if you're not trying to win? That's like the Massachusetts soccer leagues that don't keep score of the games so no one's feelings are hurt.
Now if you made a survivor tournament of solo-only games, then you're capturing the essence of Diplomacy inside a Diplomacy tournament.