The Belgian endured an interrupted season as City clinched their second consecutive title.
He has looked in rare touch in the first three games of the 2019/20 campaign, but De Bruyne says he's only getting started.
"[The assist] that doesn't really matter," he said. "A lot of people talk about that but I just don't think I played the best game.
"It's one of those games, August, for me, I'm just trying to find a rhythm and then September is easier.
"I think the first two games we played better, yesterday was more tough, but I think it's normal when you play against a team that plays 5-4-1, it makes it more tougher, you need to be more patient but in the end you need to win games in different manners and I think that's what we did."