So butthurt that instead of raising the issue of their dissatisfaction and mistrust with village they chose to go for a coup. Surely they could've talked with the village in the aftermath of kyubi attack and tried to clear themselves out of the village's suspicion. Except Itachi and maybe a few others, the rest of the uchiha's were full of hatred towards the village. Its like butthurt is a common trait that runs through almost all the uchihas.