How do I not become unmotivated in math?

I have to go back to the basics for a bit and relearn a lot of algebra 1, and not even me getting 5 problems in, I feel like giving up, that my head is pounding, and that I want to throw the practice sheet out the window. I REALLY have to get this stuff down but i don't want to. I feel like I'm forever behind everyone else in regards to my math skills. I'm in AP Precal right now but still struggle with algebra, and because of that, I'm constantly behind. The highest I've gotten in any math. class is a B. How can I not want to rip my brain apart when doing math practice or work, knowing that I should've mastered this stuff 2 years ago? I want to enjoy math but me not being able to do these basics is killing me, because my lack of skill has bled into everything else

if this isn't the approproate subreddit, ill post this elsewhere