I am sure your daughter admires you for so many other reasons. Please don’t beat yourself up. Parents do so much for our kids beyond providing specific educational insight.

For what it’s worth, math is also my weakness and I couldn’t help my daughter after 8th grade math. I took Calculus AP in high school and even took one math class in college but I don’t remember any math. My kids rely on friends for help with math.
Your daughter sounds like a strong resilient young woman. She’s learning to be independent and I hope she will see this challenge as an opportunity for growth.