We have some interesting precedents to compare notes with:

https://en.wikipedia.org/wiki/Aung_San_Suu_Kyi

That did not quite go according to plan either. Definitely not a dictatorship but not exactly clean and the end result is not so far off from where they started. Venezuela could easily end up worse than it is today.

Why do you believe some civil opposition leader will end up im power after foreign military intervention?

Usually people who end up in power are ones best at shooting others invluding shooting civil politicians.