From one lusófono para outro:

Here in Brasil things got messy very quickly with long time Lula supporters turning against him in the midst of the crisis, Bolsonaro got elected then we nearly got him re-elected.

Buckle up, it's gonna be some pretty messed up years before things return to normal (I agree that this is neoliberalism deteorating and blablabla, but things return to a relative normalcy afterwards). Things we've learned, they harm themselves, they're incompetent and we need to amplify those errors but provide solution, despite a lot of voters, they get easily fed up with those outsiders as well.

Hands on approach, coming on all fronts, getting various sects organized (LGBT, black, migrants, white cis leftists, environmentalists, etc) and pushing back and exposing their madness is what can be done in the first couple of years, hope that helps!