Don't make excuses. New Zealand have played rubbish cricket and whilst I agree that they have been unfairly treated in the amount of tests they play, they just aren't doing the basics right. Getting behind the ball, technique, putting away the bad ones.. New Zealand are just struggling to do that and whether or not its test cricket or backyard cricket you should be doing that.
And really, look at the team. It just isn't test material right now. Vettori and Bond are the only truely world class players in the team.
I'm not saying they can't win a test, I'm sure that they could because New Zealand always fights hard but really, its been poor.