Actually, Beckett had one great year in Boston, 2007, when we won the WS and he was like 2d in the Cy Young voting. Lackey also had a very good year in 2013, after Tommy John, when the Sox again won the WS and Lackey shut out the Tigers in I think game 3 of the ALCS--against Verlander.
I do agree, however, that Boston is a tough fan base.