I don’t think voting is validating the system. It’s not like if everyone chose to not vote, they would say “that’s it, current system is invalidated, let’s make a new one”….
The reality is we’re in the system we’re in, and voting is a (small) way each person can have some small bit of power to influence things.
Do you know in some places the percent of people voting is like 20% ? That means a small group of people is deciding things for everyone else.
Has a politician ever done something you liked? Some politicians have signed pro bitcoin laws - I like that.