what many people are mad about is that there is less and less of an opportunity for a middle class lifestyle for the average citizen. the import and borrow for "cheap" goods model has failed.
any free trade agreement has to ensure that the partner is manufacturing under the same standards as US manufacturing. that means OSHA and pollution controls. non-compliant goods should be allowed in, but a hefty tariff should be added. we should export humane worker safety standards.
the other big piece of our policy that has failed is the imported energy model. this is simply unsustainable, and the amount of money we have to spend to maintain access to oil is incredible. replacing it should be a top priority.
part of what holds our society together is the American dream. when this becomes an illusion, that's one thing. when it becomes utterly unattainable to the average citizen who does not have a network, it becomes a real danger. when one can't even plan to retire and has kids coming home dependent on them until they are in their 30s because of an utter lack of good jobs and the kid has enough college debt that getting married and starting a family is unaffordable, that's a serious problem. and it's a problem that no amount of cheap TVs at Walmart will placate.