As you know, I'm inclined go agree with you and I don't give them my money anymore (which I used to do in a fairly substantial way), because I feel it's just a waste. That said, Obama himself has written and said many times how the TEA Party stopped everything he tried to do and kept him from doing pretty much everything other than the Obamacare scam . (Which is one of the primary drivers in creating the Taxed Enough Already party).
So the idea that we can't effect the pub party is just not true, we can. The way to do it is LOCALLY. Get involved in local government, know who they are and who they are not, make sure others know too, form local political groups to save the constitution, then put it out there on social media, ect... There is a lot that WE CAN DO. Of course it's a lot easier to just bitch on the internet (not aimed at just you of course, we are all guilty of batching more and doing less)
The whackos have a big leg up on us in this area. The far left socialist that have taken over the dems have a lot of actual committed people. We do not. It's not in the nature of conservative people to cause a scene or to draw attention, we prefer to work hard and be left alone, and that's fine, but they will continue to be the loudest voices if that's what we continue to do as a group.
I'm not naive enough to think that we can just get involved and turn it all around all of the sudden, but I'm not dumb enough to think there's nothing we can do either. It's just a matter of who wants it more.