The failing the kids is done intentionally to dumb down society and control them . That’s why I said now they kids have to be in AP classes to learn otherwise they are not really going to learn much (at least in the schools my daughter went to)
And now you have to fight even harder.
Sad thing is I was strict with , gave up a lot to make sure she was well taken care of education wise and she thinks I am a terrible parent (in rebellion right now )
Many kids rebel, go through a change when settling down and then appreciate what their parents did for them.
I've often thought schools should offer classes to condition kids to life in society (not the sex education or socialism indoctrination). Besides the obvious like balancing a checkbook and job hunting, they need to offer better classes in the psychology of what it means to be a parent and how to be a good child. Something that was taught by parents prior to this video entertainment society.
I rebelled against my father, then started coming around in my late teens. Unfortunately he passed away when I was 19. I became more like him within a few years and then missed having him around. As a young man, I became him, got married and raised my own family. But with my memories of the past, I think I dealt better with my children and did not have a rebellious period from them. My dad did not have that advantage, as his father died before he was born and he was raised by his brothers as they tried to survive in poverty.
Good luck with your daughter, give her love and hope she comes around to appreciate you. They usually do when they themselves become parents (karma happens).