I was a post player during my days in the military. I used to have the same complaint when I was playing. But it's sometimes hard for non-officials to grasp the concept advantage/dis-advantage and all the other variables that might come into play when it comes to foul selection.
I learned as I got older to 1) adjust the physicality of my post play (offensively and defensively) to how the officials were calling the game and 2) never to lay a hand on those puny, little, fragile guards who would whine even when they got the call
I've gotten my revenge now that I'm a referee by making sure that any time a post player is getting double-teamed by a guard and a big man, that any fouls that I call go against the guards