OK. If you are a student reading this then, well, firstly I'm not at all sure you're feeling discouraged from learning about the nature of reality and potentially world-changing computing frontiers because someone on the internet said it was a hard subject! But if you were, please don't be. Here's why.
Firstly, a lot of incredibly valuable and interesting things do require a bit of concentration and effort. I'm sure you know this.
But there are reasons to be optimistic! Here are some things to do:
1. Stay calm! Don't give up.
2. It's not at all obvious how to read technical stuff to start off with. Basically, the secret is to read the same paragraph a LOT of times! Everyone does that. No-one can understand it by reading it through once like a novel. If you find yourself reading the same paragraph 100 times you're on the right path because it means that you KNOW you haven't quite grasped all the ideas yet, and so you are becoming your own teacher in a way; setting your own standards for yourself.
3. You've got to be, or become, the sort of person who can concentrate on reading something challenging, in a quiet room. Talking to others is going to help a lot also, but there's a private side to this. You can compare it to training to be on a sports team at a more competitive level. There are going to be times when you're doing fitness training or whatever, and you're on your own, and it hurts because you're exhausted. You know this was always part of the deal.
4. Don't listen to the people who tell you that it's "easy" and "anyone can do it". Yes, anyone can do it in in the sense that everyone has the biological potential to do it (they're human, they have a perfectly good brain). But you know perfectly well, just by looking around at your classmates that some people don't have, or at least don't currently have, the attitude that's going to let them do it. You don't have to be weird; you just need to let one side of your personality be a studious side, occupying some fraction of your time.