To clarify I was referring specifically to the pilot and not so much the plane. At some point the airplane will have a structural failure due to speed, but in general it seems that if the pilot attempts recovery, it's common to pull too hard and thus rip the wings/tail off (in this case both happened at some point, of course we don't know whether there was a LOC first or second). I certainly believe that upset recovery training/aerobatic training would help and that's something I've been wanting to do. If you look at when Wayne Bower's partner crashed their 340 in the late 80s, the plane impacted the ground intact at something around an 85 degree nose down angle. The pilot just got completely disoriented (according to the ATC audio he stated a gyro failure) and whether or not he tried to get out of it, he didn't succeed. But he also didn't rip any of the control surfaces off like what we saw happen in this 414 crash.
The additional problem you have IMC is that if you've gotten disoriented and flipped over/upsidedown and you have steam gauges, you may also be at a point where your gyros have tumbled and are now misleading/useless. That makes matters worse because now you're in the clouds, in an unusual attitude, your AI is useless, and you're basically looking at your altimeter to try to figure out which way is up.
One possible scenario is that he lost control, end up in a steep dive, and then pulled too hard once he got into VMC and realized what was going on. By that point it would've been too late.
I've always liked this video, showing a stall test for a Boeing 717:
If you look, you can see that they lost a lot of altitude, went WAY overspeed, but managed to recover without ripping the airplane apart from what was essentially a straight nose down attitude. They were also in VMC, with instruments that did not tumble, and remained calm, cool, and collected, following the procedures. Note they didn't move too quickly on the controls, specifically to make sure not to rip anything apart.