What did the Romans lose with the arrival of the barbarians?

With the arrival of the barbarians on the territory of the Roman Empire, the Romans first of all lost the sense of the security of their lives, freedom, integrity and independence of the state.
Since the barbarians constantly carried out brutal raids on the outskirts of the empire, and later on the capital itself, the Empire was turned into fear, and significant territories were forever lost.
With further merger with the barbarians, the Romans lost their cultural existence, the assimilation of society and its further division began.