When I have trouble doing something others find easy, I conclude the problem lies with me-- they have skills and/or abilities I don't.
Makes sense, right?
BUT
When other people struggle with something that's easy for me, I immediately conclude they're skilled and I must be doing the thing wrong.

WHY BRAIN? WHY ARE YOU LIKE THIS? WHY?

Maybe it's social conditioning. That's usually the answer to things that annoy me like this.