At the moment I'm just laughing at this memory.
Laughing at something that was so traumatic that you believe could have induced PTSD is a bit of an unusual reaction. We don't usually laugh at seriously threatening events in or life... . or chronic struggles unless we are distancing ourselves from or own true emotions.
Do you think the mock and ridicule is a shield over a more difficult emotion?
After hearing I'm the "greatest guy in the world" stuff at the start of our marriage it's hard to let ones mind think this person will ever hate me and abandon the marriage in a cruel and heartless way... . Felt that me trying to make things work and a ton of efforts and nice gestures would matter... . She made her family think she's an angel and I'm no good. She abandoned me with no emotion. Well actually anger and the look of disgust was there at moments during "the dumping". We both had to vacate our apartment... . She took our only car, money, most of our stuff, caused me to lose my job and other problems... .
This sounds like an incredibly heartbreaking and devastating loss.