The reasons mentioned in the Reuters note for Peru's crappy view of its president are numero uno cos prices are rising, and numero dos cos Alan's a liar, his pants are on fire and he hasn't kept his electoral promises. There was once a two-time president famous for cheating on his wife who had a smart catchphrase, "it's the economy, stupid." In Alan's case, only the word "stupid" does not apply. We'd have to change it to "arrogant lying dick".
Lastly, the Reuters reporters noted something very interesting in this month's survey; 69% of Peruvians approved of the insurrection (Alan's word) in Moquegua last week that at one point had between 60 and 100 police officers as hostages and finished with the gov't conceding heap loads to the protesters. Shows you where Peru is going under Alan, no? In this final link right here Reuters Lima correspondent Terry Wade looks in more detail at the problems facing Alan and Peru, and it's a good resumé of the current situation, imho. Go have a look for yourself. The bottom line is that if fatty doesn't start making a real difference to the lives of the people left behind by the nominal GDP growth of the last 6 years, you can kiss the rule of law goodbye.