No it's probably because your wasr is a piece of junk. No offense, it's just the nature of the wasr and how it was built.
You do know that there's MILLIONS of AK's in the world that run like they should, right? They also have the same ports, in the same place, with the piston being pushed back the same amount of distance. Yet, they don't have the problems your rifle is having.
Your rifle has something else wrong with it.
My wasr used to have the bolt carrier lock back sometimes during firing, and AK's don't have a bolt catch!
Turns out the rear U-shaped rod of the recoil assembly was bent inward, causing the front U-shaped rod to get caught. I twisted it open and the problem went away. Sometimes it's simple, sometimes it may not be.
you got to tell us what exactly is your rifle doing when it jams, before anybody can diagnose what's going on.
you mentioned a failure to extract, which is odd considering the AK's tapered round and huge extractor. This leads me to believe that there may be a gas port issue, the hole drilled into the barrel that matches up with the hole drilled into the gas block. Either the holes are too small, or they are misaligned, etc. Or maybe the extractor is messed up and needs replacing. It can be complex, or it can be simple.