Mummius is dishonoured, the Roman nobles have a big fight amongs each other who gets to lead the nexct army into rich, tasty Greece while the Achaean league spends its time punishing collaborators and generally behaving like they defeated Rome. A few years later, the legions are back and another senatorial fortune is made from loot and ransom.
Late Republican Rome is like playing Civilisation in cheat mode. You measure success against them by how long you could stave off defeat, not by actually beating them.