1. First of all, saying "it’s 100% a functioning democracy" is completely detached from reality. Switzerland is governed by democracy, and so is North Korea. Democracy can be improved — protests like these are precisely what can make that possible. It is not acting "against the agreement that you signed by signing" because civil disobedience is a democratic right. It’s not a movement against democracy; it’s a movement demanding its proper function.
2. Voting isn’t about choosing a savior or idealizing them. It’s about selecting the best alternative available. If you live under a representative democracy, not voting won’t change the system. In the end, it just means someone else will make the decisions for you — and more often than not, that someone aligns with the existing authority.
3. Saying, "You can't make democracy work. It is systematically wrong. Once you vote, you are legalizing a criminal structure," is pure nihilism. Yes, democracy is a flawed system — I truly dislike it. But rejecting a broken system without taking any action only serves to maintain the current order. Some fight within the system, others try to tear it down entirely — but doing nothing while looking down on those who fight? That’s what’s truly useless.