Complex sentence: However alcoholism and marital problems overcame all three Wilson brothers resulting in Dennis' "Bambu" being shelved, Carl appearing intoxicated during concerts (notably at appearances on their disastrous 1978 Australia tour) and Brian gradually sliding back into addiction and an unhealthy lifestyle.
Split into simpler sentences: However alcoholism and marital problems overcame all three Wilson brothers and "Bambu" was shelved. Carl appeared intoxicated during concerts (notably at appearances on their disastrous 1978 Australia tour) and Brian gradually slid back into addiction and an unhealthy lifestyle.