Among people I know who have experience either using or repairing automatic weapons, the M60 is widely regarded as the worst machinegun design fielded by the US since the French ChauChat of 1917.
The M60 does have the advantage of being able to be made to work, at least part of the time, but the list of design "flaws" or features that weren't as good as they ought to have been is long. (and I'd be happy to discuss them in another thread)
The fact is, that no matter what the equipment is, GIs will find some way to make it work for them, if humanly possible. "If its stupid but it works, it ain't stupid" is a real world philosphy any soldier can understand.
What reall irks them (and sometimes gets them killed) is when its not only stupid, but doesn't "work" and often they are not officially allowed to fix it so it does work.
Stingers were created to fill a need, perfroming better than what regular issue weapons were able to do for a given task. Shermans were covered in everything imaginable in the hope of improving their armor protection (it did work part of the time, against hollow charge projectiles). We fitted a C ration can to the feed tray hanger on the M60, so the belt would slide over a smooth curve and not jam due to the right angle turn from the bandolier to the feed tray.
Troops will try any, and everything they can get their hands on to make their stuff work, or work better. Sometimes, these things get recognized and general improvements get made. Other times it just saves the ass of the guy who did it, and the brass doesn't make it general use, or even squashes it.
Note that some of the brass ordered that the Stingers be gotten rid of, (once the combat was over), and of course, the order was complied with....
And when they showed up again in a later island campaign (some of the same individual guns, and as many others as could be made) the brass just looked the other way, until after the battles, when they again ordered them gotten rid of, as they were not part of the official TO&E!
I'm sure something like this, in principle, is happening today in the sandbox(s) as well. We just won't get the specific details until we hear them from the troops who were involved.