As the second image states, the three quarters of the state supported routes include state support for food and beverage services, and so they aren't a terribly good figure for comparison to the rest of the services.
The poor performance of the long distance trains isn't terribly surprising. They require more staff with the dining cars but couple it to significantly lower passenger loads.
In addition to the recommendations that the Inspector General makes for improving Amtrak, I'd like to see them do some more experimentation in preparation for the states' being entirely on the hook for their routes. As I understand it, Amtrak currently has a surplus of cross country cafe diner/lounges; playing around with these as a bar car or rapid meal service on current corridor trains is a fairly safe way of seeing if they can achieve a higher rate of return on their current services.