Anthony Brown the worst candidate of the two. Brown lost a race in a heavily blue state, and almost no one expected Brown to lose. Conway, while an imperfect candidate, still ran a better race. Conway was running in a state that has turned largely republican, and saw Republicans win many offices. Maryland, despite Hogan's win, is not considered republican state by any means.
The only reason Anthony Brown lost was the same reason the Nevada legislature flipped and Brad Schneider lost in a D+8 district:
If Brown runs in 2018, he'll win in a landslide no matter what Hogan's approval rating is, for the same reason Bob Ehrlich lost and Mark Kirk is going to lose: turnout and the fact that you're in a deep blue state.
I'd venture that Conway's loss is more of a showing of the state's Republican federal leaning bleeding down into the rest of the state-level offices.
Why is it that democrats always blame only the turnout? Can't they accept that sometimes their candidates are crap and the situation does not favor them?
You're not paying attention because just in recent memory, Coakley and Conway are candidates Democrats concede were horrible. And Brown too. Berkley was also bad, literally anyone else would have won that race and Democrats should still be kicking themselves because Heller might be locked into that seat for a long time.