Getting Straight (1970) on Netflix

Harry Bailey has returned from Vietnam and returns to college to earn his masters degree so he can teach English. He is considered a hero among the radical student body, but still sees the absurdity on both sides of the fence. He contends with the reactionary administration and the impetuous, often futile objectives of the restless students. He acts as a mediator between the two feuding bodies. On top of everything else, his girlfriend Jan wants to marry him and live a life in the suburbs. He is cornered and finally lets loose at his own masters degree dissertation meeting, just as the latest protest heats up.