Complex sentence: Angered at their leader's poor decision and his bossy attitude, the rest of the gang turn against Spanky, but after a talk with Grandma, Spanky is able to rekindle his friendship with the others.
Split into simpler sentences: Angered at their leader's poor decision, and his bossy attitude, the rest of the gang decides not to be Spanky's friend anymore. But after a talk with Grandma, Spanky is able to rekindle his friendship with the others.