Voting, for whomever best represents beliefs is a way to seek change without violence. None of the candidates are good enough? Find one that is representative.
The assumption that any means of change other than voting, requires violence is a very dangerous myth, which is still being widely propagated, almost 450 years since it was refuted.
How do some of the inhabitants who lurk within the DC Beltway manage to rule and extort 300,000,000 people?
Etienne de la Boetie's answer is, because the 300,000,000 consent to it.
That consent can be withdrawn non violently.
as de la Boetie puts it, there is no need to lay hands on the tyrant, simply withdraw consent and he will fall, just as surely as if he was pushed
https://en.wikipedia.org/wiki/Discourse_on_Voluntary_Servitude
sure, some of the folks with a big sense of entitlement will probably get violent at people peacefully saying "no", which is perhaps one of the reasons why they are so keen on gun control for the plebs, while at the same time even maintaining a SWAT team for the department of education.
as for voting being effective
https://s-media-cache-ak0.pinimg.com/564x/bb/9b/11/bb9b11bbb02c4e8df4d784957ca527ef.jpg