Only use Mazda factory engine/trans mounts. I replaced mine with a set of three I got for $100 off eBay and they were totally destroyed after less than 10,000 miles. The black one is a brand new Mazda factory mount.

 

We use aftermarket mounts all the time in the shop. When one fails it is seldom because of quality because most all aftermarket companies are at least OEM specification. And in the few times it was not necessarily the mount, but miss alignment (engine & transmission) when replacing all the mounts at one time. That procedure is seldom never done by DIY?
In your picture if the aftermarket one failed I would look into what the area of the securing fastener that should be seal from the environment was contaminated? It hard to grasp that a mount at only 10k moles had that much use wear indicators.
I am sorry but I also find it hard to believe that all 3 aftermarket mounts failed. For numerous reason!!!

 

For future reference if needed?