I don't want to be the wet blanket at the Workers' Party, but while it's vastly preferable that Lula won over Bolsonaro, it is also effectively a victory for the status quo of already-existing-terribleness.
Fascism didn't win, and that is good. It prevents things from definitively getting even worse. Yet, things are already pretty fucking bad, so, I mean, what is really being celebrated? That all this effort and energy has been directed to keeping things as they are? Perhaps I'm too cynical, but that doesn't seem like a big win.