Outside of some of the early WASR aks, which if I recall correctly, had issues with oddly shaped mag wells, Ive never seen a "Bad" AK. True, the fit and finish on some are better than others but Ive never seen a STOCK AK of any type fail to function.
AKs do suffer from the infamous "tacticool" syndrome.... all kinds of crap hanging off it, attached to it and just generally looking like a demented christmas tree.
But thats not the AKs fault, heck, some of the worse offenders in that category are almost all handguns, a large number of shotguns and any number of semi-auto rifles.