It came after defeat at home to Benevento.
“The answers were there, it wasn't an easy game," Gattuso told Milan TV.
“Given that we were coming off a week with a little tension and a poor performance against Benevento, in the first half both sides were pretty bland.
“In the final 15 minutes of the first half we did a lot better, then we continued that in the first 15 minutes of the second half.
“We had a lot of chances and didn't take them, the biggest regret was letting Bologna getting back into the game, having missed a lot of chances.
“It's no coincidence that [Giacomo] Bonaventura is out top-scorer. The biggest regret is Suso and [Patrick] Curtone's missed chances, but the important thing is to create chances and understand how we can hurt opponents.
“We're good at scoring from midfield."