He filed immediately after moving out, OW's father even helped pay the retainer and had him use the L he used for his D
Anyway, I got served and then NOTHING, for months, crickets, until I said I'm ready to get this over with, then he became like your H, pretty resistent to everything.
Point being, who knows... he wants to live in fantasy land and discussing D is just taking him back to reality. I sometimes think these H's who have OW file quickly so that they can feel better about what they're doing. Like well I filed for D so it's not really cheating.
Again, this is all speculation, but just a thought.
Unfortunately, you can lead the horse to water but can't make him drink. He is just going to choose to make things harder on himself. But the higher they are, the harder they fall