A friend of mine is having problems at his house with his parents. He wrote me the following:

"When i moved back with my parents things were fine for like three days. I haven't even been here a week and they still haven't changed. Everything is still my fault. For no reason. They treat me like a ******* punching bag. Once im going back to school that's it. Im tired of having all their problems vented out on me".

I'm still learning English, what is he trying to say?