Movies like Dark Horse

Abe Wertheimer - an odious, purposeless, self-centered 35-year-old living parasitically with his parents (by choice) and working in his dismayed father's business office (avoiding work while scoping eBay for collectible toys) - meets Miranda, an equally pathetic but self-loathing social dropout who, having given up on life, masochistically accepts Abe's sudden proposal of marriage for a knowingly grim future she won't fight against. Along with projecting his own faults onto his father, his own jealousy for lack of success and accomplishment onto his younger brother, and wallowing in the blind support of his mother, it's just another aspect of Abe's unsatisfying life that he just can't see to improve. A long-overdue decision finally spins his insignificant life out of control.