OK, but having one bad example doesn't mean that Izulas are generally crap. They sell bazillions of them, so its not surprising to have some lemons make their way onto the market.
Even with that, I'm having a hard time with your story. Even on a bad example, a blade snapping in half because of two days worth of exposure induced corrosion? Either something is very wrong with your story, or something was very very wrong with that knife.
Its utility lies in its ability to do fine but still tough work. I have used mine to dig into fence posts and pull out staples, to make feather sticks, to baton a 1" branch into kindling, food prep, and around construction sites. It's small, but relatively thick for its size, which does mean that it's not the fine slicer that say, an Opinel would be. But it's also a very tough little guy.