In the book fences What is Troy so bitter about when it comes to baseball?

In August Wilson's "Fences," Troy Maxson is bitter about Baseball because he feels he was denied the opportunity to play in the major leagues due to racial discrimination. Despite being a talented player in the Negro Leagues, Troy believes that he was not given a fair chance because of the color of his skin, and he resents the fact that younger players, like Jackie Robinson, were able to break through that barrier after his prime. This bitterness is compounded by feelings of lost dreams and the struggles he faces in his own life, leading to a deep sense of frustration and anger.