Most of the time, when a person thinks they are bad in a subject, it’s because they weren’t taught it in a way they could fully comprehend. Sometimes, the teacher goes too fast and doesn’t take the time to make sure a child is really fully grasping the topic. Other times, there’s an underlying disability or problem that’s causing the child to struggle to learn.
As a homeschooling parent who chooses their children’s curriculum, you have the freedom to adjust your methods and find a program that will teach in a way that works for your kids. Keep looking until you find a program that makes sense for you.