Yeah, this whole thing about electing the right president who will somehow magically change all the wrongs of the world overnight is a fairy tale. If someone like Ron Paul or Bernie Sanders got into office, a little would be different, especially with regards to foreign policy, but without a pliable or cooperative congress, literally nothing would get done. It would be a waste of 4 years. People overestimate just how much power the president has. Even with executive orders, there's only so much a president can do within the law. If you want universal health care, or MJ legalized, or CISA repealed, a president can't do that by himself, that requires congress.
Presidential elections are a red herring I'm afraid, and that's no exaggeration. If you want true and real governmental change, it requires you to vote the right congressmen and senators into the government.