Here is the problem with this attitude... it is pure, unadulterated entitlement. You don't want to be represented in a democratic system, you want a democratic system to represent you and the will of the majority be damned.

You aren't entitled to a representative who agrees with you, you have no right to guarantee that your view will be represented in federal politics. It's the point of representative democracy, ALL politicians are going to tend toward the centre based on what views are commonly held and your view is an extreme, untenable position that is never going to get popular support in the current political climate.

You are essentially saying that your vote is worthless, not because it isn't counted, but because the side you agree with loses the election. And this is the flaw in what you are espousing. Your vote isn't worthless, it is is worth exactly as much as everyone elses. The fact you choose to squander your vote on a position that you know is going to fail is a failure on your part to use your vote effectively, not a demonstration that your vote is worthless.

It is completely within your power to change it. First, you don't have 1 vote, you have several. The general election is only one battle, but primaries have far lower turnout and many states let you vote in one or even both. That is your chance, vote for a candidate who espouses your views in the primary and you show that a person with those views has support. Democracy on most issues isn't binary, it's a bell curve... every vote shifts the curve a certain direction and the peak of the curve is the prevailing political wisdom, which shifts all the time. You are only as powerless as you choose to be.

TL;DR: Your view is equating the right to vote with a right to have your views represented and that is not the way it works. You are guaranteed a vote, and that vote is not worthless, it simply does not guarantee that your chosen candidate is going to win. You have a right to vote, that vote is only worthless if you misuse it