I don't like my work

What is the reason?  / Why is that? (alternate)
My boss, she is very crazy. / My boss. She is nuts. / My boss is insane. (In general conversation you would rarely say "very crazy". You're more likely to say just "crazy", but for extra emphasis you could say "nuts" or "insane")
I'm work in a hospital and my work is interesting, but my boss it's  is always angry.
When she arrives, everybody has to shut up.

I don't like my work

What is the reason?
My boss, she is very crazy. My boss is very crazy (we might occasionally say what you write in conversation, but it is certainly easier to just write "My boss is very crazy").
I'm I work in a hospital and my work is interesting, but my boss it's is always angry.
When she arrives, everybody has to shut up.

I don't like my work

What is the reason?
My boss, she is very crazy.
I'm work in a hospital and my work/job is interesting but my boss it's gets always angry.
When she arrives everybody has to shut up.