Even Bulgaria managed to change their ruler

Yap, better to have diversity in tyrants than having one (that is boring) ;P

Even if election is manipulated it's better to go voting, because otherwise how to prove that it was manipulated in the first place?

Easier than when everyone show up at the elections. I.ve been through every scenario; problem is, even if you prove something, the international community does not care and inside the country legal system does not work.