I reject the premise that voting necessarily works, but even for a person who is operating under the assumption it does, no one is forcing you to choose between the two bad candidates.
There are third parties, a person can leave a position blank, and even if a person believes that voting works, they could still simply choose not to engage with that system and do something else instead.
You literally don’t have to be complicit.
I personally do not accept your premise that voting works.
but for a person who does, a third party, blank selection or just not engaging with that system are all ways to not be complicit in the actions of candidates.
If you want to talk about the repercussions of someone believing that voting works, I’ll gladly listen to you, but that’s not me and I’m gonna have to deal with it hypothetically.