MikeAqua:

I think Bridges has proven the Peter principle. 

As one of the so called 'Young Guns' on breakfast TV (with Ardern) he came across well and was generally pretty sharp.  As a former crown prosecutor he had to be articulate and think on his feet.  These days he seems to have lost any x-factor he once had. He doesn't have the same alacrity and at times he seems to struggle to state a clear position on simple questions. He almost seems afraid to give a definitive answer some of the time.

Put simply I think he has risen to position he isn't competent in.

I don't see how any opposition leader could make a dent right now.  People don't actually value an opposition in times of crisis.