If good shooters find a WASR's 8"-10" group with Wolf at 100 yards acceptable
Its not. Any of them should be capable of 3-4" groups at 100 yards with ammo they like. All my AK's shoot about the same, regardless of cost or who made them. The least accurate guns I've owned were the ones assembled here from kits, and they cost more than my SAR's and WASR's. Guns originally assembled and whose receivers were barreled in the foreign factories that made them have always been the best shooters for me.
I shot this at 200 yards with a fairly early SAR1 using its stock iron sights and Wolf 154 grain SP's. The sights have a slight cant to boot. The lower group was from a rest to confirm zero, the upper from a cross legged sitting at a steady cadence.
This one was shot at 100 yards using a Krebs AK103K with an Ultimak/Aimpoint combo and Barnaul 125 grain SP's.. Again, cross legged sitting.
Same gun and range, slow fire offhand
These were 2 second snap shots from a low ready at 50(R) and 100(L) again with the Ultimak/Aimpoint.
If you can shoot, the AK will not generally be a problem. All of mine with red dots mounted have shot pretty much the same as my AR's with red dots on them. The groups on the targets look very similar, especially when shooting targets with no aiming points.
Ammo can have a big impact. Wolf has historically been hit or miss, sometimes its great, other times, its terrible. The old Barnaul 125 grain SP's have been the best in my experience. Its got bullets with a jacketed base (like most higher end ammo), and has always been very consistent. The Wolf I've pulled has a rolled crimp base, like most military type ball, but some has smears across the base, where others are clean. Those "smears" are not good for accuracy. I've reloaded "surplus" USGI 147 grain .308 bullets that looked similar (with the smear), and would not shoot less than 10" groups at 100 yards.
The two biggest internet fallacies are, the AK is inaccurate, and the AR is unreliable. The truth is, in both cases, its usually the shooter and owner who is lacking.