I don't see that. Most press commends him for turning around Nissan and Renault.
He may have gotten greedy. His downfall was more due to social norms. Greed is perceived in a good light in the USA. Greed is a cardinal sin in Japan. (I'm generalizing)
Ghosn probably felt he should have taken the GM job when Obama offered it to him. His counterpart there was easily making more than he was despite all the financial engineering he had to do to get what he viewed as fair compensation