should I sue?
I'm very glad you guys weren't hurt!
If you need to take care of local policies to correct problems, do so through the proper channels. I commend you for that.
If you're going to sue because you made the choice to drive in bad conditions and crashed, I don't understand how that will help. I don't care what country you live in, personal responsibility is the answer.
If it were me, I'd be embarassed that I crashed. My son would learn that because I made a mistake, I would suffer the consequences, not look to blame others.
I try not to type things that I wouldn't say in person, to a stranger. I probably wouldn't say this to a stranger, so I apologize. I would certainly say this to my friends.