Sahaba abused other sahaba

Aban ibn Sa'id Cursed Abu Bakr's Father

Akhbar Makkah v3 p158
When Abu Bakr cursed Abu Uhayha for opposing the Prophet Muhammad, Aban ibn Sa'id responded by cursing Abu Bakr's father, Abu Quhafa, saying that he neither defended the oppressed nor honored guests.
فقال أبان بن سعيد: بل لعن الله أبا قحافة، إنه كان لا يدفع الضيم، ولا يقري الضيف.

See also

• Mawla Ali is leader and higher and above than every sahaba and prophet except prophet Mohammad
• Later Era people will be better than sahaba
• Who martyred imam Hussain A.S? Was it Shia or Sunni and sahaba?
• Sahaba and their sons Involved in the Martyrdom of Imam Husayn