My disillusionment is not on a personal level, but rather, on a societal level. I thought that I would become successful enough to, well, make a lot of differences in how the society works. Now being an actual part of the society, I don't see how I could accomplish any of my childhood ambitions. Even if I'm 20x richer, with a much higher social status, they are beyond me.
I suppose that the younger version of me have gone too far in pride, and too little in understanding. Which I've made peace with. But a lingering consequence is that I really don't know what to aim for anymore, not inspired by any visions, not particularly excitable. From a day-to-day point of view, I settle for being helpful to my fellow human beings. On a grand scale, though, I'm quite lost.