Bacca joined permanently in an exchange deal for Samu Castillejo.
He said: “I could've stayed at Milan, as I had that option. Gattuso and Leonardo wanted me to stay, the Coach said he'd work with me, that he considered me a player in his squad and was against my departure.
“He made me feel important, but the decision to leave was already done and dusted. I will say that Milan are doing the right things, they now have a Coach that says things to your face and they'll get back to winning ways."