With all the maul heads snapping off, I'd be checking my technique.
I'm not terribly worried about my technique. After trying to access the image, it doesn't look like it posted correctly so here it is again. Sorry for the size.
There's absolutely no damage to the handle. Never a single over strike in the 2 years of use that I got out of it. Previous handle was the same way, as was the one that was originally on the maul. My dad still has the maul that I learned to split with when I was a kid. He started burning firewood in '78, and I don't ever remember him buying an axe or a maul, so his are probably as old as me (40). Up until I moved out of the house, the maul was my splitting tool of choice (young and dumb) so I had about 6 years of service out of that maul splitting primarily shagbark hickory and red elm. I won't say that the handle still looks brand new, but it is still in good shape. My broken handles look a little better, but they only lasted 2 or 3 years, and even though they look better, they are still broken. I'm actually thinking that it has something to do with the shape of eye in the head.
As far as the expensive tools go, I have no problem spending good money for a tool. But $150 for a piece of forged steel with a wooden handle is a rip off. If it were all hand made, that would be a different story, but they are not. They are all mass produced, and the difference between a good one and a bad one amounts to about $15 worth of materials and labor. I'd gladly pay that extra $15, or even an extra $30 for a good one, but paying 3x what it should cost is insane. Good for those companies that they have been able to market their product so well, but no thanks. I'm just not spending that kind of money for a sledge hammer that's sharp on one side. If it were a double bit axe that I had to use to fell trees, that would be different. Then the quality of the steel, and attention to detail would make a huge difference in how much effort it took to get the work done. But on a splitting tool, it's just not that big of a difference. I like my X27 just fine, but it's only marginally better than the 3lb Truper axe that I have. If it weren't for the life time guarantee on the handle, I would have never bought the X27. If I'm going to save up $150 for a splitting tool, I'll keep on saving until I have enough to buy a used hydraulic splitter.