If anyone knows what they're talking about, its Anti. He's never provided any reason to doubt his post. He's arguably the most knowledgeable person around this forum when it comes to Canadian Organized Crime.
And everything started After Vito was imprisoned and far away from Canada. Clearly when he was on the street, the relationships he made with other crime groups and their bosses were greatly valued by enemies and allies alike. Quite obviously, nobody had the leadership skills he had to maintain those relationships. Thats why it was "so easy" to bring them down.