They aren't over-represented, you're gerrymandering - purposefully drawing lines so that women fall inside your tally, and men don't. If we simply do an objective headcount of the recurring Starfleet officers in the show so far, I get 4 women and 3 men. As even a count as you can get without cutting someone in two, or adding a redundant character.
And The Doctor is a goddamn treasure.
OK, like I said, you don't believe in Star Trek's egalitarian future. You could have just agreed up front that you don't like girls in Star Trek, then.