Addons aren't an 'easy-button'. They are simply tools that can show you have to maximize your damage by changing what you're doing slightly. You sound like the kind of person who would fit in great in my guild, but your performance would be lacking due to not willing to go the extra distance to improve yourself, so you'd end up getting kicked out.
It's simple, if you want to do top-end content, you need to be a top-end player. It's a lifestyle, so either get with it, or don't cry when you can't do it.