Hi Aleks- It's a pleasure to read such an intelligent, well-expressed issue. Blame is a natural reaction of the mind when it is trying to avoid experiencing painful feelings. Guilt is blame directed towards yourself; there is no difference in the function of blame or guilt, they both take you out of the feelings. Telling yourself that you're trying to avoid responsibility by dropping blame is a subtle, twisted take on what it means to take responsibility. You're to take responsibility for your feelings, not for when the mischievous mind is telling you that you’re responsible for what you did/did not do to your parents. You just have to put the whole blame game aside and go to the feelings. Don't try to process the blame/guilt - it's mental, not emotional, and does not respond to processing.
The hate you are running into is to be regarded as a projection - it gets aimed at others when it is buried within, as I discuss at length in the book. In order to get past the blame/guilt thing, I suggest going deeper into the feelings. You can temporarily quiet the blameful aspect of the mind in alpha, and focus on the feelings. Focusing on the body may help with this. The first feeling is the hate, you drop blame and feel/allow the hate without self-condemnation - it's part of the heart. Try to feel the hate without an object, or if the object of the hate remains, stay intellectually conscious that it's a projection.
Then, let's regard the hate as a first-level feeling, and look for what's behind it. Why is there the hate? With the Sun-Saturn conjunction energy, you most likely have some solar plexus congestion, some amount of feeling not good enough, inadequate, disrespected, etc. Maybe that's part of what your parents seem to have inflicted on you. You don't fall into the blame trap, you say, aha! - it appears those others made me feel inadequate, but now in my enlightened state, I understand that the feeling was all the time inside me and just attracted those outer circumstances. Or whatever core feelings are behind the hate. As you go to deeper levels of the inner work, the blame and guilt just drop away with no effort. You don't have to get hung up on that level. Go deeper.
'Hate acts as a boundary'? Don't get stopped here. Go deeper.