It means:
Zhou Wenwang and his descendants and brothers have the same surname, and there are many of them. But after several generations, their blood relationship gradually alienated, attacking each other like enemies, and the princes took turns to crusade, which was impossible for the Zhou Emperor to stop.
Pay attention to a few words:
"Then alienation", the rhythm is: nature/later/alienation. No: then/alienated. Meaning: however/offspring/alienation.
"criticize more", read more books, change, gēng take turns.