Simplify the following text for a Grade 13 native English-speaking person.
Original: The band underwent serious `` band therapy '' , engaging in a number of long talks to work out the members ' differences after accusations from Dirnt and Cool that Armstrong was `` the band 's Nazi '' and a show-off bent on taking the limelight from the other band members .
Simplified: They took `` band therapy , '' talking for a long time to work out the members ' differences after accusations from Dirnt and Cool that Armstrong was `` the band 's Nazi '' and a show-off bent on taking the limelight from the other band members .