This is a fairly standard biopic notable only for two reasons: its impressive cast of A-listers and that it's about a woman inventor.
Joy (Jennifer Lawrence) enjoyed inventing things but life always seemed to get in the way. Between her agoraphobic mother (Virginia Madsen), her perennially in love father (Robert De Niro) and her dreamer ex-husband (Edgar Ramirez) both living in her basement, and her venomous half-sister (Elisabeth Röhm), nobody expected Joy to do anything but clean up their various messes. So she invented a mop. And then she turned to a fledgling new television station called QVC and an executive named Neil Walker (Bradley Cooper) who believed in her product because she believed in it.
This was extremely frustrating to watch because everyone in this woman's life told her she was nothing and tried to keep her down so she could serve their interests. It made me want to set fire to my living room couch. But I didn't. I just fast-forwarded through every scene with her family and it was fine. (Yay, streaming!) Yes, she does succeed in the end. It's based on the life of Joy Mangano, who invented the Miracle Mop (and the skinny velvet hangers, which I learned watching this).
Joy is currently streaming on Hulu (but I think only on Hulu Live) and on TNT On Demand. We have Hulu Live for the moment because I forgot to turn it off and paid for another month by accident.