You think Mike Leigh woke up one morning and said, “I’ve decided I want to make the most depressing movie on Earth now?” ‘Cause that’s kinda what it feels like. “All or Nothing” is two-hours of bleak, miserable, focused examination of some of the most horrible people living in dreadful conditions. It kinda reminded me of Ratcatcher, but without the lyrical cinematic touches. . .which is what made “Ratcatcher” bearable. Thank God — Thank God! — there is a 5 minute coda at the end with a tiny glimmer of hope. Otherwise I may very well have stuck my head in the oven after watching. (Performers are fabulous, particularly Ruth Sheen as the not-drunk neighbor. I’m now officially in search of all of her films — she is an absolutely breathtaking performer.)