At Reverie he was alone
He got into davy back fights
Then, at Pirate paradise island he established Rocks pirates
But even after years, why he didn't go to meet IMU?
He alone rampaged Holy land, so after getting stronger and with crew, why he didn't go to Holy land again?
I really feel Xebec was looking for a particular df and that df was Yami but never found it.
And, that's why BB spend decades searching for it - because he believed only Yami is the strongest