Well, an argument can be made that his party did give up Istanbul and Ankara in the previous round of local elections (albeit with quite a fight), so it serves to reason that they're not entirely opposed to the democratic process (most of their money is hidden in off-shore tax havens and not Turkey, so they can always bail if the political scene turns hostile towards them).
The issue is that, no matter how you see the current political climate, the dude won the recent elections fair and square (as far as we know).
The people voted for this, so let them enjoy it. To me it's like Brexit, except I'm living here and watching it happen to me as well.