I finally saw it last night (it's free on Kanopy now).
What a performance by Marianne, madly cunting at the whole world like Peggy Gravel in "Desperate Living." Then in the last third of the movie she rips your heart out.
There's a hilarious scene at the dinner table where she cunts about anything and everything for about two straight minutes ("that baby in the outfit wif pockets! Wot's a baby need pockets for? Is 'e carryin' a KNIFE?") while her sad-sack husband and son eat silently, staring into space.
It's a career-defining role and I can't believe she wasn't nominated for an Oscar — much less passed over for that gerbil-faced kid from the Pamela Adlon show and the hulking Hispanic trans person. Marianne was robbed.