I have mixed feelings about Wano. It was hyped as hell, but felt very underwhelming most of the time. I blame that on Oda spending too much time on uninteresting characters. I know that not giving us what we want can work sometimes, but not all the time, specially not in the most awaited arc ever, full of cool characters. And I was already irritated that he did that in Dressrossa. I remember being very pissed off with the chapters dedicated to the tontattas and the one that had people like Fujitora just pushing the birdcage.
As in for Kaido. Chapter 795 is still my favorite chapter ever. Kaido's introduction and his reveal were very impressive. I was very satisfied with the way he looked, and very relieved he wasn't a dwarf, like some people theorized. He looked menacing as hell. So when Wano finally came I was, at the same time, hyped that we were gonna see more of Kaido, but scared that his menacing aura could be diminished. I get the feeling that Oda wanted to show Kaido as a complex character, and ok, I am convinced that he is. But he needed more development, more screen time. I am happy that he was a true powerhouse, but, in the end, it just felt like there should have been more showcases of his personality, some more explanation on his devil fruit and so on. Oda had too much going on at the end of the arc and it felt rushed. How can an arc as long as that feel rushed? In my perception, it is because of the many boring chapters in the beginning.
So, in conclusion, do I hate Wano? No. But I can't disagree with anyone that does