Don't listen to people who say "it's all subjective"; Those are people who gave up sharpening their aesthetic sense because they find it too troublesome to judge the quality of artistic works properly, so they just try to simplify it saying that "it's all subjective".
Like seriously I’m not just talking about One piece but authors from across the boards, non of them satisfies me and every show is lacking in some way I have been waiting for the perfect show for ages but it just never happened. Is that human limitations at play?
but seriously ancient stories and stories of the past are a lot better than modern ones
do you agree?
Sure, it's hard to find a writer comparable to Shakespeare or to Alexandre Dumas nowadays, especially in the West because of how much writers have been infected with cultural marxism, but at least comparing old Japanese writers to new ones, I say that the new ones are much better.
New technologies also allowed new types of literature, which have their own unique value that could not be found in old works, so even if the overall writing quality of things written nowadays is not as good as the one of things written in the Elizabethan or the Victorian Era, for example, I don't think this is a reason to disregard new works.
As time passes, some good things are lost, and others are gained, and the quality of the drawings of manga authors, such as Oda, is certainly one point of improvement in comparison to the past.