Without knowing the details, but having left a marriage myself almost a year ago, I have a couple of thoughts from the other side.

First, I think it's fantastic that you are working through and moving past what was probably the absolute worst pain you've ever felt. Divorce is equal to death. It is the death of a life both of you expected to last until you both grew old. It sounds like you have started a journey of personal growth that will boost you to a higher level of self awareness and that is vital.

But I think you should consider a few things before being so callous toward her. Marriage is a serious commitment and I guarantee it was not an easy decision for her to leave. Even if she left because of some reason that you feel you have the right to call her a bitch (ex. cheating), you have to realize that something lacking in the relationship was the root cause. Relationships are a two way street - she made mistakes and so did you. You should take this opportunity to learn from mistakes and, if you haven't, try to see her side. It's easy to cast blame when you feel pained, but it's not always the right move. Even if you are in the right, it brings immense clarity. Although I truly feel that the variables to a lasting, happy relationships are ultimately not fully the choice of the participants (you can't choose who you love), I think there is always a reason for the relationship and, usually it is to learn the valuable lessons from it.

I think if you truly didn't give a fuck, you wouldn't be calling her a bitch on reddit and tauntingly throwing out that you don't care that she is sad that she doesn't have many things anymore. If her only reason for leaving was that she wasn't happy, you are committing a giant wrong in thinking she is a bitch. Trust me, if she could have chosen to love and been happy with the person she was married to, it would have been easier than choosing to leave. In the end, you have even admitted that you are in a better place, which ultimately means her leaving was the right choice for you as well.

That being said, I do wish you the best in your spiritual journey. I myself felt vastly wronged and I'm not certain I will ever fully "not give a fuck" but it does get easier every day. When you fully give your heart to somebody and they chose to consistently think of themselves over you, it leaves a scar that takes more than a few months to heal.