The problem is threefold I think.
The first problem is that stupid suspension system. It feels flimsy. I can easily move the tub around with my hand on these kinds of machines. I don't understand why they can't use a conventional suspension system like what is found in other typical top loaders, unless they're skimping.
Second, these machines are designed with very fast spin speeds, which are completely inappropriate for the suspension. They don't balance out properly and "Go for it" anyway even though it isn't appropriate.
My old GE Top Loader would make a racket when it tried to spin an unbalanced load, but it was programmed so give up and spin slowly or abandon the spin rather than destroy itself.
The third problem, despite the poor suspension and high spin speeds is user error. Even though I very firmly believe that a washer manufacturer should design a machine so that it can't self destruct, the user tends to choose a cycle and/or spin speed which is inappropriate for the load, so the machine can't handle it.
I once put in a pair of pillows into my old Inglis Top Loader machine and the machine gladly shredded them. User error on two parts, first, the gentle cycle wasn't used and second, I tried to wash pillows in an Inglis top loader.
So, basically it all comes down to poor engineering on Samsungs and LG's part. I don't think I'd ever consider buying one of these machines for those very reasons.