Those days never existed. Stories of directors struggling with studios are as old as Hollywood itself. The only directors allowed relative free reign were the ones who consistently delivered financial success, like DeMille. "Red Ink" Allen's arrangements are the exception, rather than the rule, and his refusal to allow the studio to even see the script is unique, as far as I know.
"Those days never existed."
Well, briefly. United Artists was founded by filmmakers who want control and money.
Quit using other people's money. Everyone has to make concessions in life otherwise.
Mel Gibson did it "his way".