To be honest, every one of those interpretations confuse me in some way. I can't even seem to explain how, it's just that the entire movie just messed with my head.

Spoiler:

To be honest, I'm confused on what the whole instramentality thing actually was. I have an idea, but I don't know enough to be able to explain it. In the end though, Shinji stopped choking Asuka didn't he? I still don't understand why he would want to kill her in the first place though.