Here's the thing, why would you ever assume that the Democratic party has ever had an interest in 'doing anything'? They are the ones who, when granted the political writ, doubled down on neoliberal economics and funding the war machine back in 2010. And you can go back even further to see that they are always, always doing similar things, no matter what the political mood of the country is. All they do, and literally what they tell you they do is 'Be the Republicans but smarter.'
What if I'm not interested in that? Then it isn't in my interest to vote for the Democrats and this supposed propaganda isn't my personal undoing.
The Democrats don't do things for people because the party is literally defined by ripping out the levers and mechanisms of power that make the party even mildly accountable to the people, as people became even mildly radicalized. The Republicans, on the other hand, appear very accountable to their base because what their base wants is good for capital. If their base suddenly didn't want those things, they would be cut out just as fast as the Democrats did to theirs (Which btw we are starting to see in real time wrt Zionism within the party.)
It's not bourgeois propaganda, it's literally just having a memory longer than the last year. Truth is the most effective propaganda.