The people chastising you for cutting your dad out of your life simply don't understand. I do. Fuck your dad. Fuck his negativity, selfishness and lack of empathy. Fuck him.
These things take guts to do. Good for you. Understand that the guilt you feel is because you actually possess empathy. You now possess the wisdom to remove the poison from your life and provide an example to your kin that they don't have to be shit on and call it love. Good work. Steady as she goes.