Every time I think that this D.C. United season couldn’t get any worse, well, it just does. The lone chance that United had to salvage anything from this awful year dissipated last night, as they lost in the semifinals of the U.S. Open Cup, 2-1 to the Columbus Crew. Of course, it wouldn’t be 2010 if United didn’t lose in an utterly heartbreaking fashion — in this case, it was an own goal which a deflection off the leg of Marc Burch in the 89th minute which tied the match, and a penalty kick from Guillermo Barros Schelotto in the opening stages of extra time — which doomed United.