I understand your point (I don’t know the original The Root post, but I especially enjoy the Root user comments). Sure, all politicians are to an extent liars, and sure, we should hold them to the highest standard (which of course they won’t reach).
But I believe that the nature of political discourse is that since no one can be all things to all people, sooner or later, every politician will let down someone.
Sooner or later everyone will feel betrayed by her / his favorite politician.
(My hero George McGovern, after bravely opposing our participation in the Vietnam War, voted against a proposed dietary pyramid that would have de-emphasized the importance of meat (he was from a state dependent on the cattle industry).
If from a list of all real people living or dead you could pick a single person as president, sooner or later that individual would let you down.
I’m not saying you should accept someone you feel is (at best) an imperfect choice. I believe we should all realize that the true source of power is ourselves, and if we don’t like this or that about our elected officials, we should first ensure that we have overcome those flaws in our own lives as best we can, and then we should encourage our elected officials to do the same.