Danm, I don't remember konoha Jonin being so petty to anyone other than the village jinchuriki. Though only root and uchija Jonin were jerks to everyone.
He should only train her in exchange for Uzumaki sealing techniques.
Itâs possible Tobirama didnât know all the sealing techniques that Kushina inherited.
I have a feeling one of the jinchurikis will go crazy and kushina will be his opponent which causes the mc to knock them both easily letting him finish the quest