I may be 'bad' at maths. But it's not as simple as that, for me anyway. I'm bad a mental calculation, I can't count without using my fingers, I do not know the multiplication table, and division is hard for me.
But I don't have a problem with the mathematical concepts used in maths more complicated than addition, subtraction, multiplications and division. I find algebra easy to grasp, probability, geometry, trigonometry makes a lot of sense to me.
Which I think was shown in my GCSE maths exams. I got a C overall. I was on the higher paper. I got A's and a B in the calculator papers, and D's in the non-calculator papers (I'm fairly certain I got my marks on those papers because of my workings out).
So, am I bad at maths? Yes! No? I don't know.