TOFFAIR sums up the situation well, but on domestic you will often be away from home for up to five days, depending on the routes flown. Even the Sao Paulo/Rio shuttle sometimes has you staying in Rio overnight.
TAM at least has a better possibility of moving on to the international fleet, and the roster on international is much more friendly, typically 16 days per month with additional standby duties, but coming into the 320 fleet you will be waiting a long time to move up.
AZUL offers return to home base (Campinas) every night, but their salaries are around 10% lower, so take your pick.
The comment about management is pretty accurate, don't expect much in the way of consideration or respect. Management's attitude is that there are so many waiting for the chance to fly at the bigger carriers that there will always be another FO to take your place.
TTFN