Being bad at math does not make you dumb. I failed math at school, and thought I will fail computer science.

I had very hard time in calculus 1 and 2, but appreantly I'm great at discrete mathematics. Introduction to mathematical logic was so fun, I took an advanced course in temporal logic.

Finished the degrees second in my year. Got into a multidisciplinary masters program and finished that too.

I'm now the guy that gets the problems others failed to solve in the lab.

On another note, the person I got to know that is best at learning math, sucks at every other subject in life. He can read math books cover to cover and then use it even a year later. He can't prooerlly feed him self, not from home made meals his mom packed for him as a student and not shopping from the store. If you can take food from the the refrigerator into your plate without making a huge mess or poisoning your self, you are already ahead in life.

tl;dr being bad at math doesn't make you dumb. School level math has almost nothing to do with programming and Uni level math.