1) Corporate personhood and sociopathy
Corporate personhood just makes sense. Why would a group of people functioning collectively not have the same rights as each individual within the group? And, of course, a corporation cannot vote in elections or hold office, anyway. If you want to argue that corporations should be held to strict transparency standards, I would tend to agree. I also have no problem with the government demanding certain parameters among corporate structure and accounting standards.
As to sociopathy, corporations are no more sociopathic than the people running them. When you have good people in power, the corporation tends to be a positive force for society. When you have bad people in power, you end up with huge problems. That doesn't make a problem endemic. Unless you really believe that all or most corporate managers and directors have no conscience or empathy for human beings and the world around them, you simply cannot argue that corporations per se are sociopathic. Impossible.
2) Material envy
Predates capitalism. Predates mercantilism and feudalism, even. Human beings are flawed. When someone else has more, we often envy the person we consider more successful, especially when that person "doesn't deserve it" for whatever reason. Marketing and advertising can have an effect on the more easily-led of us, but they operate in response to human nature, they don't create human nature.
As to credit, haven't we seen that easy credit does NOT always work to corporate favor in the past few years? There are some gigantic corporations that are dead or on government-sponsored life support because they wanted to make quick bucks using financial instruments carelessly.
3) Effects of credit overextension
"Families can get ahead over generations, through luck, persistence, hard work, and good ideas. But in doing so, how much of their soul do they sometimes lose?"
Lose their souls how? Do you think any of those things truly can steal your soul? Working long and hard is bad for individuals and families? I don't understand this at all.
"We are all like rats running on a treadmill faster and faster except we're not in good shape - we eat too much processed foods and don't exercise"
Speak for yourself.