The truth of the matter: the EDSA revolution was at its heart the overthrow of one oligarch clique by another, and the overthrown clique given mercy was never going to stop bitching about its right to rule. And the clique that did the overthrowing threw those who would have reformed this country under the bus in its attempts to allay the concerns of the oligarchs as a whole. Cory Aquino was a toothless figurehead for the oligarchs and almost every other persident of the Philippines after her has been passively or actively undermining the rule of law and perverting the idea of justice that the EDSA revolution promised. The Philippines under those circumstances was never going to be a success story.
For a success story, you need to actively purge the government of oligarchs and their shills, and redistribute their land equitably, all while assuring the Americans that this is no communist revolution. A nigh impossible task that would take years, if not decades.