HO, I posted something on my thread that was partly addressed to you but sadly, there are many more who it applies to. You CAN choose to give up, that IS your choice but doing so in hopes that your suffering ends there is probably not the right reason.
I understand your frustration, I've been there and back SEVERAL times but each time I realize that I have goals that I have not achieved and still have a LOT more work to be done, even in within the f'ed up confines of my battered marriage.
I hope you make the decision that will truly lead to your peace and happiness. I too hope you give this some more thought and do NOT react from emotion.