Of course anyone can vote for who they like, or not vote at all, no one’s saying otherwise. It’s Harris’s job to earn your vote, and she clearly hasn’t. But pushing third parties as the solution to any problem is going to do more harm than good until we get a better election system. It may feel better to vote for a party that more clearly aligns with your positions, but if they have no path to actually acquiring any power to make change, you’re doing nothing while feeling like you did something. Changing the policies of a flawed party that actually has power is much harder, and yes, there might be compromise or half-measures, but that’s an infinitely more productive path. (More productive than that is doing direct action outside of the electoral system entirely, but both things can be done at the same time.)
“The leverage” to do what exactly? Put in someone who will be way worse? How does that help the left accrue power or accomplish our goals? If you think the Democratic Party’s takeaway from the left tanking a major election will be “we need to move left more” I have a bridge to sell you. We are not a majority, which means we need to form coalitions. We can’t do that with a reputation of blowing up everyone’s shit when we don’t get our way. We do it by showing how successful the party is when they listen to us and include us. No, this time we don’t have a particularly left candidate to vote for. Yes, it all sucks. But I have yet to see a concrete explanation of how picking or allowing “far right fascist” over “moderate” has any benefit in the short or long term. To my eyes, it just causes vulnerable people here and around the world to suffer.