thats not the point, his main power his bankai was stolen. all i'm im saying if he had his bankai he would have solo'd Bach.
lol nope. Bach was more powerful than yama thats y he was able to steal bankai. Which means yama wouldn't have defeated bach if it wasnt stolen. That fake bach was unable to steal his bankai because he was weaker than original bach. Thats why yama was overpowering. Yamamoto himself said that his bankai is not so weak to be stolen which means you have to be stronger than him in order to steal his bankai.