Took me a chunk of time last night and then a bit this morning to read the two entire threads. This has entertained me no end!
OP I’m glad your death was greatly exaggerated and that you and DH have got your lovely sofa and enjoying gaming night.
With regards to M0/lying-crazy-person as long as your close friends and family know the full situation, including the bit about this woman being a bit delusional about your DH then I think ignoring it is best. But please keep copies of the messages from various M1-12, M0 and M0 friend just in case M0 goes even more off the deep end and things escalate. At least you will have some evidence of history to back you up.
To fellow MNetters wanting awesome hilarious DHs I second OPs advice of date nerds. Also gingers. Gingers often learn to laugh at themselves very early on as do nerds so when they “grow up” they make brilliant DPs. The only downside is if you are also of the geek/nerd variety you will need multiple games consoles or fighting happens. Also you have to share your “cave”.
I’m now almost disappointed my gamer Viking didn’t come with detachable parts though...