You think that democrats will change if we just stop voting for them
I don't know how many times I have to repeat this point for you to wrap your head around it:
the problem isn't the choice of voting in-itself, it's the choice of placing rhetorical weight on it at all
Democrats will continue losing on their own as conditions for millions of Americans continue getting worse and the democrats continue obstructing popular efforts to fix it. That isn't me organizing against them or boycotting elections - that's a very simple statement of fact. Millions of Americans will lose enthusiasm for the democrats if they do nothing. They will continue doing nothing if they think they can still win their elections by appealing to the center. If the people who are screaming at the democrats to take drastic action proudly keep proclaiming that they will dutifully keep voting for them anyway, there's a very good likelyhood that they will both lose due to voter attrition and mis-diagnose the problem as having not appealed to the center enough. They assume (because the left keeps telling them so) that they aren't losing support from the left, so they must just be unsuccessfully appealing to the center right.
Clarity of message is everything. Democrats have rock-bottom approval because they continue to obstruct systemic change. Full stop. They will continue losing votes to voter apathy if they continue undermining the popular momentum in the base. Full stop. There is no amount of 'lesser-evil' proclamations that will reverse that trend, but it will absolutely mislead liberals into conflating a lack of enthusiasm for democrats for an abundance of appetite for reactionary policy.
You are making that mistake right now. "You're just republican lite" is the same type of damaging conflation as when Zionists accuse anti-zionists of being antisemitic.
Mamdani won because a record number of those people came out and voted for him, dumbass.