The democratic process may be slow, but it is governed by the people's will. This is the fairest form of government out there, and it is by far better than the alternative of a dictatorship, where the people's best interests are not always on the mind of the ruling elite.
In response to pork barrel politics, it doesn't have to be all bad. Yes, there are corrupt individuals who only want to see their own wealth grow. But there may be times when other issues come up that are just as critical, and if one politician suggests a solution to one issue as a stipulation to agreeing on another, then that is both beneficial and efficient.
Democracy isn't without its flaws, but those flaws can also work to benefit everyone, not just a handful of people.