Zonca does not romanticize and makes little attempt to excuse, but they are very believable and very real people. His deliberate pacing may well end up being more frustrating in the US than in his native France. And it would be one thing if the pacing were used to add depth to the characters. Frequently they are involved in some activity that tells us little about their character beyond that Isa is not particularly fastidious with her nail polish. Overall there is really about a half-hour or perhaps an hour's worth of story here spread thinly over 113 minutes.
Moral indignation is jealousy with a halo.