I personally don't care about Orochi's backstory other than how he got connected to Kaido and WG. Orochi is an arc-only villain who thinks he's a hotshot because Kaido has his backing. Doflamingo and other antagonists have a larger impact on the story and have more meaningful backstories even if they can't be redeemed. It's also why i personally don't hate them or even the evil Yonkos like Big Mom and Kaido since they're interesting characters.
Orochi isn't interesting at the slightest and I'm just waiting for his slow and brutal death.
Pretty much, but he seems THE arc-only villain to look out for. Orochi is a perfected version of Spandam, I think. But I guess Oda wants to make Wano the biggest arc ever so he leveled up Orochi to meet the right standards.
I think we will come to appreciate Orochi's character a lot over time. Despite him being scum, for someone as lowly as a child servant for a Daimyo to become a man capable of subduing an entire country and teaming up with Kaido, it must be good. I can't wait to see what Oda has in store for us. From day 1, I've always wondered "how the hell is this guy the shogun? Dude looks like a nonce m8" and finding out will be cool.
This flashback in general is already looking very good. I didn't mention this earlier but this chapter gave me early One Piece vibes. Oden, Kin'emon, Denjiro, everyone is very fun to read!