Step-by-step explanation:
1 - Puppetry, being used by his former jailers and racists to push white interests and selling out his own people.
2 - Lack of vision. He was not a reformer. He failed to reform South Africa, the country’s cultural values, education system and so on.
3 - He failed to address the crime situation and endemic violence in the society.
4 - He failed to improve and expand the education system to everybody.
5 - He was not practical. He thought every crisis could be solved by talking peace, while the enemy is busy invading, raping and butchering civilians. Case in point, the DRC war. He opposed intervention in the war as 25,000 Ugandan and 6000 Rwandan soldiers advanced towards the capital. This is the kind of leader who would allow terrorists and invaders to cause mayhem, instead of countering the insurgency with military force.
6 - He was not much of a Pan Africanist. He took his orders from his western handlers. He was told what to say and do.
7 - He threw the struggle of black people under the bus, in favour of international celebrity status. Being feted by celebraties was more important to him than reforming his country.
8 - Results of Mandela's legacy can be seen today. A highly uneducated, destructive and violent population. Mass school dropouts. Highest crime rates in the world. Millions of people living in slums.