For me at least:
1. I don't "hate" my body, I just would much rather it look male. I think it took me a long while to be able to accept my body the way it is, and right now I don't really have a problem looking in the mirror or anything, except that I don't really like to. I've always wanted a flat chest, never wanted these things on me and I feel so much better when I can't see them.
2. I'm not quite sure what you mean, but I've always wondered how/why women seem to like their chests. I thought it was "normal" that I didn't want it there.
3. Yeah, sometimes I feel like I don't really care because this is what people are gonna see me as anyways, sometimes I feel like not going anywhere because of my chest. Once I went out and spent the whole night with my arms wrapped around my chest in utter discomfort. It happens. Interestingly for me though, it annoys me more when in dressed than not. Even a therapist will tell you that it's okay to feel differently about things from day to day.
I've also been trying to understand what dysphoria is, I've come to understand that it's basically the collection of things that make you uncomfortable with regards to gender (talking about gender dysphoria here). Dysphoria is the opposite of euphoria. Its different from person to another, so I'm afraid there's not really a checklist for one to go through. In a general sense: there's body dysphoria, that has to do with your body and how it fits/doesn't fit with your gender, and social dysphoria which has to do with the social interaction aspect (ex. pronouns and such). Some people have both, some people have one more than the other.