to me its very simple, there is no excuse to not show up to beis din when called upon, there is no EXCUSE PERIOD!
If someone doesnt show up you are automatically in the wrong. There is no being dan lekaf zchus. You can say the wife was abusive etc etc etc..
Show up to beis din & speak to them, air your grievances or go to a dif. beis din.
But to not go to beis din & not giving a get you deserve everything & everything thrown your way.
I am very happy to see that this is being brought into the public light. If the husband has a beef with his wife there are solutions, but not showing up means automatically guilty even though he may have had a very strong case against her.