Sekiro to me is one of the prime examples of a "git gud" game. Without a doubt it's harder than Dark Souls. In DS if you suck as a knight you can try a mage, here we don't have that. The game looks deep into your soul and says "my way or the highway" and I gotta respect that. In Sekiro you can't use summons or call other players for help. You just have to "git gud" in the game. The only time I managed to cheese a boss was the Demon of Hatred 40hrs into my first play-through. Learn the patterns of your enemy and learn to deflect and you shall be fine. By the end I was in love with Sekiro and the lessons that the game tried to teach me. I guess my main problem is the story it's not interesting enough.
And if you want a tip for the start of the game, just DON'T give Kuro's Charm to Kuro. That was my first mistake and it's something I learned when I started NG+ because I gave it to him the first time and then I finished the game without it.
"The Kuro's Charm item is given early in the game, when you collect the Ornamental Letter. After meeting Lord Kuro in the tower and gaining your primary sword, you'll have the option to give away the Kuro's Charm. Giving away the charm increases difficulty by adding chip damage to all blocks."
Then again I finished the game without it but it was hell... that final boss was a nightmare.
9/10.