Complex sentence: In spite of the behind-the-scenes battle to win over industry executives, their fan base organically grew nationally and overseas; yet, one opportunity after another fell through eventually leading to an abrupt end of the band's career.
Split into simpler sentences: In spite of the behind-the-scenes battle to win over industry executives, their fan base organically grew nationally and overseas. Yet one opportunity after another fell through eventually leading to an abrupt end of the band's career.