People are so pissed off that they don't want to vote anyone. They just want to vote NOTA.

That doesn't change stuff, right?
If it's popular, some people should band together and create a small group or party of their own, or support a independent candidate or so who'd be more supportive. And wouldn't there be atleast one leftist party there, to take up the issue?

Choosing not to vote would just make the other parties write them off. If it's using the vote as a way to bring attention would be better, then yeah, it's ok. But if they're really not voting then that's bad.