Legislative proposals are refined and polished in the process of debate. And even then, when a law is enacted and later recognized to be bad, it can be changed or repealed by the legislature. The system of government is truly the best system yet devised, but it is not perfect. It can never be perfect until the people it represents are perfect. Government is a reflection of the people who created it.
Government can be no better that the people who empower it.
Government will be, at any given point in history, what the majority of people want it to be. That means that at any given point in history, about half the people are happy with government, and about half are not. The continual struggle between conflicting forces is what keeps the American government in balance. Students of history can readily see the influence of conflicting social forces reflected in the policies of government. Shifts in ideological direction are very slow in real time, but historically, the shifts are fairly predictable and consistent.