Math was always tough for me. Topped out in Algebra 2 when Nixon was president. Majored in philosophy so no math required (symbolic logic sucked though).
Ironically, I ended up managing a lab at a defense contractor (mostly due to mechanical aptitude) and made a career of doing radiation effects tests. I could do the math by taking extra steps and memorizing hacks, but it worked.
You can figure out things,or fix stuff if you need to or want to badly enough.
It gets tough for everyone eventually. I flew through Calculus in high school, got a 4 on the AP test, and then was totally flummoxed by Linear Algebra in college.