"It's unfair, it's cruel," Baup told the media. "Or whatever you want to call it, but the result is the result.
"Given the match we played, it's hard to accept. We know that Lille are 1-0 specialists, with a tough defence and an unbeatable 'keeper, who shone again tonight.
"We just need to keep playing our game. We brought in some new forwards in the summer and it takes time to get things running smoothly - but we need to work on our finishing."
Marseille are now 10 points behind Ligue 1 leaders Paris Saint-Germain in fourth, having played a game more.