Hey paco,
Allow me to clear some assumptions that you've made:
I am not a follower of López Obrador, neither have I ever voted for him. Nor am I asking the president to resign.
Now I respectfully disagree with the statement that we had clean elections: There are taped testimonies of people who were paid for voting, exceeding campaign budget caps, using State budget for a candidates propaganda (at least in DF, we saw A LOT of propaganda for EPN when he was governor, likewise we see propaganda for governor velasco now). Along with why not, testimony of cartels or armed man "taking custody" in voting centers so you could not vote for candidates that are against such men interests. So what does it mean when all/most parties play dirty in elections, and politicians in general? :/
Im also inclined to correct your assumption that México lives in a democracy: the political parties act as a shared monopoly. Most if not all parties hold this political power, for their best interests.
Am I overstepping or making wrong assumptions about the quality of our governors? If I am, please, somebody point it out so we can try to back it up or dump it in case im wrong :)
Now, maybe you, along with a fraction of our population, disagree with the sentiment that we are being scammed by this people. Of course that is valid, and I don't think I implied that "everyone" wants some sort of revolution, evolution, change for the better, etc.
I seriously believe, that the fact that we as a society are not taking over is either because: a) We actually ignore the fact that we are being ripped-off. b) We play it safe because we fear alternatives that could end worse (like Lopez Obrador :P)
Now what is my opinion? That we ought to be heading in a way to digital democracy. To be able to "upvote" propositions. (like in http://democracyos.org/ ) And we as a society start taking active responsibility.