The main reason why we do not get out of the World Trade Organization (WTO) is that essentially no economists agree that it is ruining our country. Essentially all economists argue that free trade is good for every country in the world.
Without free trade, it may be true that some jobs would come back to the United States. There are two problems with that. First, all the American workers who took those jobs would get much higher pay than people in other countries. This would mean that the price of goods would go up. American consumers would be able to buy fewer things and our standard of living would decrease. Second, the kinds of jobs that go overseas are generally low-paid and require relatively few skills. We do not want American workers (who are generally better educated and have more potential) to waste their skills and potential doing things like sewing shirts together. It is better to have the less-skilled and less valuable work done elsewhere.
So, what is wrong with America? First, we have to realize that the country is not ruined. We have one of the highest levels of GDP per capita in the world. Our overall economy is still the biggest in the world. Our unemployment rate is up from where it once was, but it is by no means high even when compared to many rich countries.
To the extent that something is wrong with the US, it is that we may be losing our edge in innovation. We may also be losing some economic confidence as our government continues to fail to enact decent budget policies that would stabilize things like Medicare costs. What is needed is not protectionism. It is better education and perhaps better government policies in terms of taxes and budgeting.