I live in Southern Ontario and the single largest reason I get a "no" from private landowners is due to previous hunters either leaving ruts in the field or garbage and making overall poor decisions. Farmers tell me stories of shooting to close to livestock to damaging fences and frankly coming and going whenever they feel like it. Something to consider..... when you ask to hunt there land it does not meet that's a free pass to come as much as you like and bring all your buddies who then intern bring their buddies. I think there are plenty of opportunities for hunters, it's work and to many look for a short cut.
I don't know how much traction you will get with landowners looking for hunters online....