How old are you? Do you really think a person will appear and all Muslim nations will suddenly advance and become undivided overnight? Look at the Muslim nations currently, they have more than enough wealth and brains to advance, if they acted like real Muslims, they would be undivided and unbeatable by I any adversary. It's actually the love for money and power that has made Muslims weak, stop waiting for the Imam Mehdi to fix everything that you are incapable of sorting yourself. For us Ahmadi Muslims he came and went and left behind a valuable message and blueprint of how to spread the message of the Prophet(pbuh) globally through the true ways of Islam and education. We are not standing still, we make progress on a daily basis, unlike our majority Muslim masses who only seem to love fighting and show the power of Islam through violence.
I'm not sure this earth will ever be 100% fulfilled with justice, peace and tranquility, I think you have been taking too many of your pills and living in fantasy world. This is the problem you hit when you don't educate yourself. Have you ever read any books on anything but jihad. The Qur'an is a very simple to read yet complicated at the same time, each verse has many meanings, you can not take stuff literately or out of context, you need to read it fully and understand it before coming to childlike fantasist conclusions like above.