A Beautiful Mind (2001) is a movie that is based on true events and that won 4 Oscars.
But here is the main question: why did Nash get schizophrenia? I think it is a problem with many truly genius people. If nature awards you with a big brain and a huge potential, your mental health is usually affected by this the most. Nash is one example. A genius with schizophrenia. I can list you quite a lot of gifted people whose gift was the cause of their unhappiness. Jack London, one of the greatest writers probably in the past 300 years, abused substances and went on to commit suicide. Ernest Hemingway, bipolar disorder and psychosis diagnosis in later years. Leo Tolstoy, depression. I could go on and on. In my opinion, if you have an extraordinary mind, it is often at the expense of your happiness. I don't know why, perhaps because they crack under the pressure.
Anyways, I want to let you know that there was a John Nash in real life. He died in 2015 in a car crash with his wife Alicia, was a professor at Princeton and had schizophrenia. The real life's John Nash got several nominations and prizes in math for his revolutionary discoveries. He went on and changed the whole idea of game theory, got a Nobel Prize in Economics in 1994, won the Abel Prize for discoveries in non-linear partial differential equations and many others. So there was a lot of things to be proud of in his life. If you are thinking that you really need motivation, then this video was clearly meant for you. Get it together!