When I was a kid, I was bullied, luckily briefly as I moved to another school. I went to my parents for help, and they gave me the whole, "kids will be kids, and you have to deal with this on your own." They refused to even call my school about it. That didn't work at all. I tried sticking up for myself, ignoring them, etc. But I was a small, nervous kid, the kids bullying me were very frightening to me and just laughed at my attempts to deal with it myself, and the bullying got worse.
When I was older, I talked to my parents about this, about how I had needed them, that I lacked the capability to deal with the bullying on my own, and how them refusing to help me had not made me stronger or more independent, it had just made everything worse.
Their response to me was basically, "We're sorry. We made a mistake, and we're sorry if our actions upset you. If you have children, you can do things differently than we did with you."
I was perfectly satisfied with that answer. No hating of my parents necessary.