Ignoring the easy second line, the answer to the first line is: we have two political parties in the US. What if neither are doing what the voters want?
Then people should stop being dumbfucks and engage in local (which are frequently non-partisan) and state elections and primaries, and stop pretending that "the president didn't fix everything and make this a socialist utopia, so both parties suck" is a useful or vaguely intelligent criticism.