First of all, do you think the US would do anything about anything, out of the goodness of their heart? Hah. Maybe you believe their interventionism is part of their efforts to build world peace, or maybe to, how do they say, "spread freedom and democracy"? Such naivety. The US protects its own interests and those of its business owners. If that means overthrowing democratic governments, so be it, if that means genocide, so be it, etc.
Second of all, the callousness with which you propose simply installing a puppet and letting the US govern the country is beyond description. Tell me, how would you feel if a foreign power decided you don't know how to govern your country, and that you need rescuing, and that from now on he would be in charge and dictate how your country gets run. Would you like it? If the answer is, as it must, "no I would not", then the only conclusion I can draw is that you view the Venezuelans as somehow incapable of making the right decisions and ruling themselves. As babies, or morons. Colonialist thinking, nothing else.
Thirdly, your point about letting oil multinationals ransack the country, and how that would, somehow I guess, improve the lives of the population. I won't comment on this one, because I cannot even fathom the train if thought here.