The manager (malcolm) of the sex pistols just wanted a boy band so he could make profit off them, I know Sid and Johnny both hated Malcolm for the manipulation and constant traveling, and finally made a focus on how their music was. Futhermore, Malcolm used thousands of dollars for making the great rock n roll swindle movie without the consent of the band and Rotten called him an "evil mastermind" because of the bands name was taken from a clothing store used for marketing. For example, Johnny Rotten believed that the band was very creative and Malcolm took all the credit. Sid Vicious hating the absolute fuck out of Malcolm was for him expiloting Sid's image into making him look dangerous. I'm not talking shit, I don't mean to, I love the pistols with all my heart and wished the Sid wasn't in the fucking ground because of his girlfriend getting stabbed by Sugarplum fairy.
TLDR
Malcolm Mclaren used the sex pistols image for his own benefit and Johnny and Sid hated him for it, doesn't mean I love them (this was prob way too much info)