Subtract when I was afk or picked while slowly turnfighting someone else. I have no problem with a BnZing LA7 or any kind of LA7 as long as I see it and pay attention to it.
At altitudes below 10,000-15,000ft an La-7 BnZing a Spitfire Mk IX is no different than a Spitfire Mk IX BnZing an A6M. If the Spitfire Mk IX is superior to the La-7, then perforce the A6M is better than the Spitfire Mk IX.
As to the BnZ deaths being due to being AFK, well, either you're lying (most likely) or you have a severe problem with going AFK in combat zones.