As a quick question why do you think you are entitled to a direct route? They are at the discretion of the controller and should not be counted on when you are flying around. Because the controller doesn't want to is the best excuse for not getting one. He/she doesn't have to provide directs, they are not part of the mandate of being a controller. We are there to make sure you get to your destination safely. End of. All they are doing is doing their jobs as laid down in their procedures, without all the extra stuff that you seem to think should be god given.
I don't think the action will work mind.