FWIW, the divergence I guess stemmed from me saying: Yes, absolutely the bulk of the Democratic party is corrupt.

No the divergence was that your whole previous comment didn't mention the subject of Biden running a second time when the Democratic party clearly doesn't want to vote for him a second time, and how that will affect the vote outcome, and who would be responsible for a loss to Trump.

Instead you replied challenging me/people in general about how active we are in the voting process and what we do to improve the system, our responsibilities.

I don’t see it so much as, the establishment Democrats holding the voters hostage (although in a sense they are), as much as: As bad as the situation is, helping the Republicans is also going to make things worse, so spending the effort putting real pressure on the Democrats to do better seems more productive than just waiting until election day and then not voting for them.

Well, it truly is the Democratic Party's responsibility to put up someone that people would want to vote for, so if they don't vote, its not the voters fault, its the party's fault.

Overall, I used to think the same way you do, but the problem is that that technique of pressuring via guilt gets reused over and over and over again over the years as a control mechanism. So at some point you just have to push back against it, no matter what the cost, or else you'll never be able to choose your own votes. You can only take so many "hits for the team" before you have to do something about it.

Like I say, aside from voting and talking on the internet, I haven’t been doing squat. I’m starting to feel pretty bad about that and that I should be doing something.

Well for a start be sure to use the Congress app (or equivalent web site) and track/pay attention to how your elected officials vote on things, and hold them accountable (by contacting their office and letting them know, and if that doesn't change things, by changing your vote) for how they vote.

Do research (takes me about twoish hours per election) on people who are on the ballot for those small offices (comptroller, judge, etc.), and make sure you vote in the 'right' ones (aka the ones that fit your preferred world view).

Also, try volunteering from time to time, for people who are running that you think fit what you want to get done in Washington/state office.

And finally, consider running for an office yourself, try it on for size, see how the sausage gets made, etc.

Metaphorically speaking, you got to tend to the Democracy garden, or else the flowers/plants will die.