The Mandalorian works because it’s a blend of a samurai and old westerners with music and a theme to match. It’s easy watching.
The Book of Boba Fett has a weird soundtrack, not a really good theme that it sticks to, too many shots in the dark that’s hard to see, and a story line that’s hardly packed with much action and a lot of talking. It also features steampunk kids, mixes in edgy music now and then and and goes back to tribal influences? Just a weird mix.
It should have been a bounty hunting space adventure. Not a flashback in the desert about a guy who wants to be a crime lord but not really.