Screwed over in what way? Overuse for pitchers? Because I know they've always tried to get as much exposure to their players as possible. Even so if that's the case, as you have said it's improved. Wouldn't he want it to continue to improve so that players that are in a position similar to his have a greater chance at success? Because I can almost guarantee you any mistreatment isn't done maliciously.
You're right, he owes them nothing, sure. Just as no player owes the community anything when they start foundations or charities. You can still respect where you came from and try to reinforce positive change. Dominican players come from s*** situations too, far worse than Canada. You dont see those players saying I dont give a s*** about my homeland because America does it better.