The score says how it ended. xG says how it should have ended: it is the sum of the chances each shot was worth, not an opinion about the game.
Angers created more (1.86 xG against 1.21) and left with nothing.
Angers: −0.4 for the season (7 in the table). Lille: +3.9 (4). The gap between points and xPTS is built from matches like this one.