Thank you for the clarification. I understand your story better now. I the logline you only include the essentials because you only have 35 words max to tell your story. Beyond that, people will lose interest.

Here is my rough rewrite which includes the essential elements: main character, major event, the dramatic need of the main character and the obstacles that may prevent him from achieving his goal.

“When a maverick billionnaire entrepreneur becomes penniless for his unscrupoulous dealings, he is driven to turn around a near-bankrupt company hoping to reverse his fortune but is facing management’s hostility against his business ethics.” (34 words)