Ok, I just want to ask one question, did you know the short stack at all? Were you 2 from the same country? Were part of the same poker forum
by any chance?"
If yes to any of these then yes I can see why they would think such a thing, and you should also feel the same way.
Now If you answer no to all these questions, than you played a strategy which I honestly never thought about applying/playing but now just gave me another move to use in future games.
Is the move itself soft play (Come on man, it is, lets be fair about it), Is the move unethical (Once again, lets be reasonable), Is this a great strategy that you used to increase your chances of winning this game (Yes it was).
Congrats on the win, and well done, but I honestly couldn't have used that move myself (Just saying)