If they are going to forfeit their right to vote and their right to be part of the process, then their complaining doesn't hold much weight to me. If it does with you; that's your choice.
If they were a part of the process, sure. If they were not part of the process, they can still voice their concerns, and I have every right to not listen to their hot air.
I don't like any of the candidates running for office fully and probably never will. I believe that the best you can do is vote for someone that matches your values as best as possible because I doubt most folks will ever find a candidate that their values match fully with. You are basically picking the lesser evil when you vote. But if you don't even bother to vote, then shut it up as far as I'm concerned.
I'm not much into people that yap yap yap but put forth no effort or action.