Flick was sent off for his celebrations after Ronald Araujo's injury-time winner, which will see him banned for next week's El Clasico at Real Madrid.
Afterwards, Flick insisted: "These are three very important points for our confidence in the future and in the upcoming matches. I'm very happy for the team.
"I'm very happy for Ronald. He's very committed. I asked him, and he said he could play in that position. We tried it, and I'm very happy for the player, the club, and the fans..."
On his celebrations, the German continued: "Football is about emotions, it's about tension. It wasn't for anyone, it was just a celebration.
"Sometimes things are like that. We haven't played our best football. But we scored, and it gives us confidence.
"Frenkie (de Jong) was there and they showed him a card. My reaction wasn't directed at the referee. And I don't know why he showed me the second one.
"The celebration wasn't against anyone, it was about how we won. I was happy. I don't and won't do anything against anyone. I accept the referee's decision. It wasn't against him. I applauded so the team would react."