Have I been misdiagnosed as a sociopath?

First off, bear in mind I'm no proffesional. Anyway, you said it yourself. Able to detach, deceive, rationalise. Not fond of others. That does sound like sociopathy. Also the anger issues and killing of pets (even accidentaly) are a red flag. On the other hand, you felt remorse. You're getting help. You're not a bad person, you're essientally just reacting to trauma in your childhood. I'm so sorry about the ual abuse in your past. It sounds like that is the root of many of these problems.