Mistake

It's such a strange feeling, I understand that I'm putting a lot of effort into my work and business, I see progress, but it seems to me that I'm doing something wrong. I see the approval of others towards my work, to whom I show the pages of my novel before the prologue is released, they say that everything is fine. But I feel like I've made a mistake somewhere, that I'm doing something wrong, because I don't like the result of my efforts, that I can do better and more, but I just don't have the strength left. I don't know... I think I made a mistake...