Sunderland fans had plenty to say on social media after the 1-0 defeat at home to Millwall on Saturday. Sunderland welcomed Millwall to the Stadium of Light on Saturday, where the Lions earned the win needed to keep themselves in the Championship for another year. But for the Black Cats, it was yet another forgettable outing in the Championship this season. Mike Dodds’ side looked like they had turned a corner in the last few games, going into the game against Millwall in the back of a 1-0 win at West Brom last time out. But Sunderland were lacklustre all over the pitch on Saturday, with defen…