Complex sentence: He tends to become very angry whenever he suspects that Ranma is'cheating' on Akane or otherwise is treating her badly, being intensely paranoid in this regard, wanting the best for his daughter, and looking forward to the day she and Ranma will marry.
Split into simpler sentences: He tends to become very angry whenever he suspects that Ranma is'cheating' on Akane or otherwise is treating her badly, being intensely paranoid in this regard. Soun wants nothing less than the best for his daughter, and looks forward to the day she and Ranma will marry.