On the contrary, without laying blame the same people that failed stay in power to do it again.
You are basically saying don't look backward but forward. But not forward but forever twirling, twirling twirling!
We need a clear eyed view of the situation, and to employ reason, and reason decrees without qualification that the establishment is doomed to fail, that they aren't popular, not trying to be popular, and so unable to reliably win at all. That if they do get in will not fix, will not restore, will not enforce the laws against the connected, will continue to allow all captured government agencies to remain so, continue to allow corporations to cheat us, etc.
Can't win, won't be popular, not trying, they quash popular reformists that is their raison de etre. They refuse to address root causes of problems, ie the rich stealing our lunch.