Political parties are the sine qua nons of representative democracies. They are simply not going away.
That said:
Yes, anyone can withdraw his support from any candidate or official for any reason at any time. Why would I continue to support someone with whom I no longer agree on policy? I am the public, Fred. I'm not Boss Tweed.
The idea that advancing/supporting the candidacy of a person with similar political, economic and/or social values constitutes "load(ing) the electoral process" is one with which I fundamentally disagree. It is no more than taking an active part in the democratic process.
And yes, there is a possibility that our proposal will be rejected. That's the way the cookie crumbles. I don't have a problem with that.