In fairness, while the Big Dig was a total crapfest while in progress, the end result made a tremendous positive difference to the walk- and bike-ability of that area. It's still not perfect (four+ lanes of angry commuters), but it's not like they could just get rid of I-93.
Totally agreed on the dollars for transit part, though. Still way too much emphasis on making cars' lives easier in Boston at the expense of everyone else.