One doesn’t become the CEO of an entity by being ‘nice’. A high percentage of CEO’s get to that level because they are psychopaths or sociopaths (there are some good books out there that cover these types of people). Either of these personalities don’t make for a ‘nice’ person in the least, and selfish, vindictive, narcissistic and bullying traits usually become manifested and quite obvious as enough time passes by. In short, most CEO’s are complete assholes.
Now, if you have a CEO who is brought in to rebuild a business with the view to the business being sold off or floated in the share market, which in turn will see the CEO receive tens of millions of dollars as the reward for their hard work, well you are going to have a CEO who is likely to be a hard knuckled vicious asswipe who will stop at nothing to receive their large pot of gold awaiting them at the foot of the rainbow.