No dictator has absolute power. They can't rule a nation single-handedly. Their will is enacted through others. There are many generals, and in essence an entire ruling class who run the country, and benefit from the status quo. He rules through them, and his power depends upon their consent to follow his leadership.
His uncle is almost an irrelevance. The system continued. It might have even been in the interest of others in that system that his uncle was removed to benefit them in some way. But, none of that really has much bearing upon the original point:
His rule depends upon others, and they will place constraints upon what he can and cannot do. It doesn't matter how enlightened, or how despicable, his wishes are. It will depend upon others to carry them out, or to refuse to do so. And they might have their own agendas and demands as well. That is what I meant by walking on a knife edge. He must balance competing internal interests, plus external ones, in order to maintain his position and the stability of the nation. One critical mistake, and he's gone. The same applies to all of the other people in power there as well. They benefit from their position, but one mistake and they are gone too. Not nice, but that's the way it is.