Bollywood movie Rockstar

Actually I am with you, before expressing anything, for the first time I saw movie I had liked it mostly because of Ranbir's acting and awesome songs.

but later I to felt what exactly was the story line of movie, it was supposedly a journey of a small town simpleton to being a big Rockstar, his journey of music and his love...

I was not totally convinced when he was shown in disrupting mode, there was no big failure shown in his love path, he had no band members with him me may had fall out, he did not indulged in drugs or alcohol, I wonder why he become so rebel and goes singing "Sadda Haq Ithe Rakh..." [well the song is awesome & can be considered anthem for all rebellious people]

He has no big reason why he destroys himself at least not shown convincingly...I will say the movie has great one line story but was poor in screenplay...marked by its great acting by lead star and awesome music...

Not to forget I liked the climax scene "Naadan Parindey", where both protagonists meet virtually in the end when Ranbir stares in the void...