Sorry, bad luck doesn't explain 50% fail rate.
Yea, the 360 was definitely a poorly designed system. I think rushing it out to launch to be ahead of the PS3 had something to do with it. It took them several chipsets to finally solve RROD completely. It probably wasn't the smartest idea to make the console concave, causing heat to stay right next to the chip. And then you had the lack of any DVD drive stabilization, which resulted in scratched discs, even if the system wasn't touched. If you did touch it, it would destroy the discs. Power-wise it was good, but when it came to reliability in the first couple of models, and disc drives for all models, it sucked.