Splatoon worth it if not online gaming?

Good morning all,

I was thinking of picking up a copy of this game. They're pretty cheap nowadays but I couldn't find whether or not we'd enjoy playing the game in single player only? Everything I've seen on the game seems to stem from the launch period which was back in 2015. The consensus then was that there was only 5-6 hours of gameplay for single player and no bot matches and limited local multiplayer (1 vs 1).

Since it's 2022, I figured I'd ask if there have been any updates since and if the game has more content that would make the single player potentially worth exploring? Thanks