I realized a shorter way was there and I felt rather stupid.
Did you make a mistake? I mean, who doesn't make mistakes?
My mind was just elsewhere and I missed out on a smart decision.
It is good to learn from mistakes. Keeping an open perspective can help if the situation comes up again.
I did it to myself and it was all my fault.
It does not matter if it was your fault or not. The important thing is that you learned from your mistakes.