And not voting for a major party will fix that how?
Even if a significant portion of the population goes third party (and assuming they all agree on the same party), splitting the vote has only ever helped the opposition.
And if Democrats are just Republicans from the last election cycle, which is an absolutely unhinged notion but I'll humor you anyway, voting for Democrats is still in my best interest since Republicans are even further right
You've legitimately lost your mind in a purity test if you can't see that.