Complex sentence: During his reign at the "Times" he eliminated more than 200 jobs, but despite an operating profit margin of 20 percent, the Tribune executives were unsatisfied with returns, and by 2005 Carroll had left the newspaper.
Split into simpler sentences: During his reign at the "Times" he eliminated more than 200 jobs, but it was not enough for parent company Tribune. Despite operating profits of 20 percent, the Tribune executives were unsatisfied with returns, and by 2005 John Carroll had left the newspaper.