You're here because this community helps you get through a brutal process. My situation has been a lost cause probably since the day I came here. I'm still here, posting, working through it, learning from the experiences of others who have been through it. You're a lost cause when you give up working on yourself.
Be compassionate for yourself. It's normal. All of it. You can't snap your fingers and become invulnerable to the words of someone you used to care about more than anybody else. It's a process.
I also wish I could find that center and ground myself, to somehow be open to healthy dialogue while also being impervious to the slings and arrows. Sometimes it's hard to distinguish the two. Nobody is perfect, everybody struggles with this (I don't care what any vet says), and we are all human.