[westopher]

She hates your DOGS. People who hate dogs are the bane of my existence. She hates the most loyal and loving creatures on earth, who would take a knife to the face for you without thinking twice. She doesn't seem to appreciate social interaction to a degree, and comes across as insanely selfish. I understand I'm only getting one side of it, so it could be skewed to at least some degree, but I gotta say man, think of it as a new beginning. You just got surgery to fix a debilitating problem and you are on the road to recovery. Fuck scars! It just tells a story of the trials and tribulations you were man enough to face head on and should be worn as a symbol of pride. She says you are too positive?! Does she like to be sad/angry? Some people really do, and they aren't fun to be around, and to constantly be trying to pull out of the shitter. Embrace your new future! One without negativity! Honestly, it sounds exactly like the situation so many of us are in when we are in our mid 20s. First really serious long term relationship, and no knowledge of the fact that it can be better. Once me and my wife got truly serious, I never had even a thought to end it. The girl before her, that I was on and off with for over 5 years, was very similar to what you describe. Always looking for the negatives and I couldn't make her happy. Why should I? Thats her choice and until she decides that its her fucking problem. If this girl doesn't feel like being happy, don't waste your happiness on her. Save it for yourself and someone who appreciates it. Someone will.

TL;DR
Let her go. It can be WAY better for you.