Sounds like my brain would fry working on that stuff.
It only took me 3 tries to get through linear algebra - mostly because of a friendly instructor. During those 3 quarters I aced the third quarter of calculus and the first quarter of differential equations. Later I aced something they called modern algebra that was actually more of a topology class.
My brain just doesn’t work well in more than 3 dimensions.
Can’t multiply two matrices? Keep trying, it’s good for preventing or slowing brain atrophy in old age.