Your vote counting for little in the Senate is exactly the purpose of its design. The Senate represents the states by its very nature. By design, states with higher populations' votes count for less in the senate. If your argument is limited to "majorities should rule because it's just that every vote counts the same" I'm going to have to disagree (or, perhaps more accurately, remain unconvinced). Your argument is that our country's system of government is fundamentally ill-designed. To reflect those values, we have to throw out the Constitution and start over. I need a whole lot more and better argument before I'm willing to consider that.

Revise laws to mitigate gerrymandering? Very much in favor. Make DC and perhaps other territories a state? I can definitely be convinced; indeed, my thinking is that they should have been long ago (though perhaps another solution would be to add them to Virginia or Maryland in the case of DC). Increase the number of representatives in the House? Probably favor.