Looking back in 1902, Debussy explained the protracted genesis of his only finished opera: "For a long time I had been striving to write music for the theatre, but the form in which I wanted it to be was so unusual that after several attempts I had given up on the idea."
Debussy was already formulating a new conception of opera. In a letter to Ernest Guiraud in 1890 he wrote: "The ideal would be two associated dreams. No time, no place. No big scene [...] Music in opera is far too predominant. Too much singing and the musical settings are too cumbersome [...] My idea is of a short libretto with mobile scenes. No discussion or arguments between the characters whom I see at the mercy of life or destiny."
source: WIKIPEDIA
I myself have only recently overcome my stubbornness and pouting regarding the operatic form (without ceasing being critical). To have the earning to write dramatic vocal music for stage, but not finding a place for your ideas within the present genres in society can be quite frustrating and confusing when you dont have the experience or knowledge to untangle your ambitions from reality and finally become organised ... I´m getting there.