Why? Please be vague; haven't seen season 1 yet.
Because being a Star Wars fan is like being given a glimpse of hope every few years, and suddenly you sit in the same old container full of shit, and you cannot believe they fooled you AGAIN!
I liked The Phantom Menace. It wasn't perfect, but a nice start. Then Attack of the Clones happened.
I liked The Force Awakens. It wasn't perfect, but a nice start. Then The Last Jedi happened.
I am very wary of the second season of the Mandalorian after that really nice first one.
Fool me once, okay. Fool me twice, it's my fault. But you won't fool me three times, you motherfuckers at Lucasfilm.