Here's one of my big plot flubs:
When the Kelvin collided with the Narada, why didn't the antimatter in the Kelvin's core utterly obliterate Nero's ship? I mean - COME ON! we all know very well what antimatter explosions can do in the Star Trek universe! If Archer's Father's ship had antimatter - if the Enterprise NX-01 had antimatter, then the Kelvin did too.
Less potent antimatter?
The Narada is 5 miles long. An antimatter explosion could easily destroy a ship of that size.