Complex sentence: Launceston Matric had been successful in lower division competitions, however top tier successes have eluded them, and they fail to live up to the successes of fellow "Tamar-side" rivals.
Split into simpler sentences: Launceston Matric had been successful in lower division competitions. However, top tier successes have eluded them, and they fail to live up to the successes of fellow "Tamar-side" rivals.