I respond as someone that has done well with maths historically but who doesn't care to do them currently. I run GURPS, which is known for being super crunchy. (It doesn't have to be but it can be and I recognize the reputation.) Whatever crunch there is, however, is front loaded. Players should have everything they need in game on their character sheet. I have two programs that I use for character creation. They handle the math for me. I use a VTT (roll20) that can handle movement and I don't use rules that would lead to me needing to do math.
I guess my suggestion is, you don't need to get over the dislike or the aversion, unless you want to. Being excellent at math is not a requirement for running a good game. However, if you do want overcome the dislike and the struggle with math, perhaps Math Doesn't Suck can be helpful. By age alone you are not in the target audience for the book, but the author did struggle with math when younger and then went on to get a degree in Mathematics
How does copyright law slow progress in mathematics or physics? People who are doing original research still publish, and their work is freely available.
Let's look at a different scenario: let's say you're a celebrity and gifted in math like Danica McKeller. In a world with copyright she can spend a year working hard on a book and hope to make some money off it, while girls get inspired to pursue and persevere in math. Doubtful that she'd bother in a world without copyright. So in this case, copyright is actually helping, is it not?