Why did Slash get kicked out of Guns and Roses?

Answer 1

Slash left because Axl was being a control freak and not doing any work on the new Guns album, and Slash apparently couldn't stand that much negative energy.
He was having problems with Axl Rose; they were fighting all the time and the end for Slash was when Axl took off his solos of a song

Answer 2

now this is an interessting question to answer, many would state that axl never left the band, they are correct, but if you want to get really technical, than because he wanted more controll. in about 1995-1996 axl (sending a messege through band managers as he no longer talked to the other members directly) told slash and the other remainders that he was leaving Guns and taking the name with him (as he owned the rights to the name). so axl made a new GN'R but it still had the other members in it, just now on contract they were now "hired", so axl left but took the name, so in a way, he didnt leave

Answer 3

Steven Adler was the first member to get fired form Guns n' Roses. He was fired for his heroine addiction.