“As someone who has friends from both groups, the premise is beyond ludicrous. I would even go out on a limb and argue that Chassidim have happier marriages. (I am not Chassidish.)”
What are you thinking is “the premise?” That Litvish and Chassidish marriages are different from each other? If so, it seems like you do agree with the premise by your second sentence.
“Trying to generalize about whether chassidishe or Litvishe marriages are more or less “successful”l, “happier””
The OP specifically says that that isn’t what this thread is about…