Movie about a male ballet dancer going insane

[LilCerberus]

Trying to remember a movie about a late 19th century/ early twentieth century male ballet dancer's decent into madness....
He has a controlling older brother who manages his career....
A few scenes I recall, one point he tries to stand up to his older brother, but gets smacked...
Another, he tries to choreograph his own work involving a man playing tennis against two women, but it gets bad reviews....
He tries again involving something to do with a native American massacre, the crowd boos uncontrollably, & they show him losing it back stage....,
It ends with him sitting in the dark in a straight jacket.....

[LilCerberus]

Nevermind

It was Nijinsky(1980)

[Dalmatian Bobby Samaritan]

1980. Good year. That bad Popeye movie by Robert Altman. I was going to say Raging Bull but that is Boxing not ballet. Although it seems like Robert De Niro's character goes insane in that movie too. Which I believe was made in 1980. 1980 must have been the year when actors and their characters go insane (I kind of do this weird thing with years in movies where I notice so many movies constantly do something of the same theme or node but only in that year. Like 1987 was the year apparently where you had to see some kind of strange machine that uses a grappling hook. 1988 was the year where you are seeing big blue tubes or vials or containers with Blue liquid. 1986 was the year when Atheists could break off of Christians and become mainstream and prominent people.)

I have a deep reserve for aliens and any movie that has George Carlin. Hey I am glad that we are talking about this and not breeding a new Jean Claude Van Damme that can do the splits or talking about Jamie Foxx to see if he came back as a clone after he got sick. So Lilcerebus is this a good movie? I am glad that you came up with the right one. Wasn't Heart of Darkness about a descent into madness? Was this like Heart of Darkness but applied to a Ballet Dancer?
I can't say that I have ever been into ballet to the extent that I would want to know. But I appreciate this forum for letting me back in to the subtleties of film and other film styles or tropes. This does not exactly sound like a new trope though. Something already out there as per Heart of Darkness or Ben Shapiro's podcasts (my guess is that guy's insane jealousy that he can't be a ballet dancer. A Brachiosaurs 30 foot neck would have three times as much dead space or 15 pints. Again something that Ben Shapiro would be jealous of.)