If you have a hypothesis (even if it is fed to you by a known source of lies and manipulation) I encourage you to investigate it using scientific reasoning. Trace the causal chain. Look for evidence that may support your hypothesis but always look doubly hard for evidence that may refute it.
That sounds well and good but very difficult in practice due to ones limited time and resources.
If I understand correctly what you have written you do at least agree our election process has issues but that those weaknesses favor the Republicans more than the Democrats. And that the last election could not have been rigged.
So why is there so much resistance from the Democrats to at least look into these issues that might be a problem? Of all the responses so far, only Laughing Dog has made a fair response to improvement of voter ID, IMO.