How effective Congress has been in pursuing our best interests is, of course, a matter of debate. Do not construe that statement as negative. Let's face it, your views on any particular issue and how Congress handles that issue, influences your thoughts on how well you believe members represent your interests. If you do not feel that your representatives to the House and Senate truly reflect your views when they vote, then do yourself a favor. Rather than complain, vote against them in the next election.
Action always brings results.
Complaining accomplishes very little. In any event, communication with those who draft the legislation that affects our lives to a tremendous extent never hurts. Some might argue that it also does not help. I look at it this way, you have nothing to lose. From this page you can link to the home pages of those members who have them.