Conversation so far:
Who were the librettists?
CANNOTANSWER.
What did they do?
He was highly demanding and bad-tempered, unable to maintain longstanding partnerships with his librettists, with the exception of Louis de Cahusac.
How long was Louis with him?
Louis de Cahusac, who collaborated with him on several operas, including Les fetes de l'Hymen et de l'Amour (1747), Zais (1748), Nais (1749), Zoroastre (1749; revised 1756).
Were there any other notable librettists?
the librettists Rameau did work with were second-rate.
What else did he do with them?
He made his acquaintance of most of them at La Poupliniere's salon.

Question: So they quit because he was rude?
Self-contained rewrite: So the librettists quit because Jean-Philippe Ramea was rude?