It's very likely the greatest Manga of all time, but it's not a masterpiece. There are a few things I think would have made the Manga better like making the Black Swordsman Arc after the Golden Age, or reveal the Idea Of Evil far later in the story.
I hear a lot of fans say he has the worst life ever. Would you agree with this opinion?
I think he had a really bad start, but because of his hard work, he overcame a lot of hardships. So he has a better life now because of it.