I.e. screw slightly fewer people so public forgets about it but law enforcement gets to keep screwing people. They'll never get rid of it completely.
If the progressive Democrats could take over the party and control it then I'd agree with you about a), but effectively what the Democrats can do is controlled by Krysten Sinema, not the progressive wing.
And both Trump and the progressive wing of the Democrats shows how untenable the current situation is, and how insufficient the Democratic party has been.
If you start to view the Democratic party (aside from the progressive insurgents) as being bought for by large corporations, and then understand that all the failings and excuses of the Democratic party are really just delivering to the customer what they want, it all makes a lot more sense.
And when it comes to the failings of the Democratic party -- like Krysten Sinema -- the trick is to stop going "oh if only she wasn't in the way we could have fixed everything, we have failed due to this externality" to realize that she's playing the role that the people who have bought the Democratic party want her to play and she's a feature, not a bug. And there's always been an excuse like that for the past 30 years.
Hopefully the progressives do eventually succeed or else we're likely to get some actually competent fascist on the right wing.