Complex sentence: The band and supporters were diappointed in his decision but the remaining members of Averi decided that they wanted to continue as a band because they felt they owed it to themselves and those who supported the band to keep moving forward.
Split into simpler sentences: The band and supporters were diappointed in his decision but the remaining members of Averi decided that they wanted to continue as a band. They felt they owed it to themselves and those who supported the band to keep moving forward.