I wouldn't extrapolate too far from those horror stories you heard. My experience was nothing like what you describe. Plus there are many reasons to get a PhD other than going into academia and when you're a grad student you don't have to deal with any of the politics or the other "grimy" parts (at least not in the vast majority of cases).

There are many downsides to academia, the papermill mentality that has become pervasive being a big one, but this picture of a morally bankrupt subculture where people do whatever they can to get to the top is nothing like what I experienced.