Stoptech Major Failure

Wondering if anyone here has had experience with or heard of stoptech brakes failing. A few weekends ago on my way to dubrun I had to pull over because everytime I touched the brakes the car would vibrate violently. So we pulled over and my front pass. wheel was literally smoking hot. Continued smoking for ~10 minutes or so. After 30 minutes we continued as we were just 10 miles away and 80-90 miles from home. Took it easy for obvious reasons and finally got to tear down the brakes this past weekend. The part which holds the brake pad was crumbling, there are not chunks of concrete on my garage floor.

So I contacted stoptech told them what happened and they had a shop in my area contact me to sell me what I needed. Am I wrong to think that something like this should be covered regardless of being second hand? The kit has 40k miles and the car has never seen track duties. What I’m getting from this is that Stoptech’s aren’t even capable of DD duties nevermind serious track use.

PS shop said its likely because the car has seen road salt.