OP, the failure of your embodiment of the BB model after seven years does not discredit the part in any way. It is the same as saying you drank a quart of whiskey twice a day and lived to be 110 or you never ate a gram of fat and died of a heart attack at 25 years old. So what. Is that the mean result expected? I don't think so. Unless you know the average usable lifetime of the particular part and its comparable competition (earlier, later, contemporary) and their standard deviations, you cannot derive any conclusion about its design integrity or manufacturing quality. Blow off steam if you must, but know it is just anecdote, among the least reliable of all data types.

In a broader sense the preoccupation of many on this forum with eternal longevity of their bicycles is ludicrous as is taking the failure of a bike part or wheel or frame as a personal affront. Everything wears out, some things sooner, some later. Some newer bicycle and bike parts designs emphasize other attributes like weight, aerodynamics, stiffness, etc. at the expense of longevity. That may or may not be what you want, but it is certainly neither evil nor a conspiracy against you and all other right thinking consumers. If you really think you will be happier with an obsolete square taper BB and compatible crank that you haven't already owned for 25 years or so, just go for it. I'm sure you will be able to find one somewhere. Personally I'm happy to have the modern developments. If some designs don't work out as I expect they should, well...(shrug)...that's life. As a good friend of mine says, "Hey, it ain't a kidney."