It feels like freedom. Have you deleted family or friends.......
Yes. Life is too short to be unhappy.
I've experienced this short-term (days) feeling of regret and guilt, then pretty much forgotten, and less stress in my life. Then, every so often, maybe once a year or two, have brief contact with them again. Those old feelings pop up, optimistic that perhaps we can renew the relationship again, and then you are quickly reminded of why you stopped having contact with them and what a good decision it was.
(1) There are times when YOU are the problem and they are not the ones able to make you happy. Do not enter a relationship or maintain a relationship based upon their ability to make you happy.
(2) Realize only YOU can make yourself happy. It comes from within. Sometimes this requires some personal responsibility and acceptance.
(3) Do not enter or maintain a relationship based upon your ability to change or fix someone. People are who they are. You should have recognized it. Do not waste time and energy trying to change them. End it and move along.
(4) There are people with legitimate personality and/or mental health disfunction. You cannot fix them. It's not your responsibility. It's on them.
(5) Some people are ignorant, but can learn. Some people are stupid, but you can't fix stupid.
(6) You can't pick your family, but you can pick your friends and inner circle. Most adult, independent, people have the ability to pick and choose who to interact with. If that means eliminating toxic family members, so be it.