Well, I remember in the 70s when the M-1 series was being developed and tested, the press had a field day picking it apart as an inefficient, costly, gas-guzzling piece of high-maintenance crap that would be a deathtrap to American soldiers due to the ready availability of man-portable tank-killer rockets like the RPG-7.
They were partially right; it is a costly, gas-guzzling, maintenance intensive piece of equipment. Like any AFV outside of science fiction, it is more vulnerable in close-terrain and urban environments where infantry can sneak up close and fire man-portable anti-armor rockets, especially at the less protected flanks, rear, and top of the tank.
It also rules just about any battlefield you care to deploy it too (a trait shared with most modern MBTs, but the M-1 series was prominently tested in 91, and validated the design concept with flying colors). It was designed with a specific battlefield role in mind, unlike the Bradley series, which tried to be everything, with the result that it couldn’t do anything well (at more than twice the cost of “lesser” vehicles).
I’d say that the SMAW you speak of does its job very well; the problem lies not in its function or efficacy, but in the way it is employed.
A lot of “crap gear” lies not in the fact that it is designed poorly, but in the fact that it is several generations out of date, but still serviceable, and “adequate” to the task, so it is retained as a “cost effective alternative” to the lengthy and costly design and procurement process the DOD has.
For instance, the old L.B.E. (Load Bearing Equipment) was, IMO, crap. But my Grandad would’ve been proud to storm the beaches at Normandy with it, confident in the knowledge that it was a modern, efficient system for toting gear into battle with. 40+ years later, I was still dealing with the same equipment, and one of our chief complaints after GW I was the crappy, inefficient L.B.E. gear. We recommended a more modern “Tactical Vest,” which is sort what the military has now.
This is what I went to war with; just try getting through a narrow tank hatch quickly wearing that! What we wanted was something more like this.