I see a lot of people eagerly wrote off the series by the first few chapters.
But now that we are 13 chapters in, I can confidently say that the series has grown a lot.

Story - The story was great from the beginning. Especially the lore and workings of this series, the world building, etc has been good and it has only become better since then.

Art - The art in the beginning was rough and was hard to understand. But it has immensely improved since then and the art has become a lot better. The colour panels especially looks hella impressive.

Characters - The characters were seen as boring and bland in the beginning and a lot of people judged everything off of the first few chapters. But the characters have got a lot more development now and I am emotionally invested in them. A lot more intrigue has also been built on other characters but Hachimaru has grown the most as a character.

Enjoyment - I am really enjoying Samurai 8. I wasn't this invested in the beginning but I kept reading it because I knew that Kishi will come through. And honestly, I am glad I kept reading it cause now, the series is way more better than it was in the beginning.

Overall I would say, everyone should give this series a chance till chapter 13. You will find yourself enjoying the series and it's themes. You won't regret it.