I think you should have a standard to determine whose more at fault. Simply always having yourself to blame is bad in acknowledging the problem and fixing. This is under the assumption you haven't done this. You agreed to DA has a fault to it so this is mainly words if you want to read it.
Basically if I do x and I know x is bad in the moment and I am able to change it to be good then I am fault.
If I learn about how bad it was after the fact, I should take steps to make myself aware of what I am doing while I am doing it or at very least reducing the problem.
Bad is in your own system of good and bad not something I am putting on you.
Able is kinda iffy.