Why Lenny was ineffective..

Yes I am talking about Donald Trump's apprentice. From the day one I thought Lenny had something which takes to be the champion. Towards the end he ended up being an ineffective leader. Being cool or looking cool about things can take you to some extent but not all the way. Even though I hated him go but agree with Mr. Trump's decision of firing him for the following reasons:
1. He was not a team player. He quite often mentioned fire everybody in his team.
2. He tried to divide the team to make his position safe.
3. No question that he does the job if assigned but sucked as a project manager.
4. He is the man who does not know how to accept his faults.
5. He was given hints and chances to step up, but he did not.