Smirfy
I really fear you are not understanding the game engine. You are taking no account of morale or experience, or of aircraft types.
I've attached below 2 combats I've just constructed out of an onging WiTE game, the basics of the game engine are close enough that its comparable.
Now you sent in what are essentially fighters (P40 and Spitfires), I am assuming that you have allowed the crews to retrain to the bomber role but those are not the planes I would have chosen. You don't tell us how much flak there was but you lost 7 planes. The combat reports in WiTE are different but look at the top one, the Germans had near 200 guns, I used Sturmoviks (and the squadrons have Gds status, high morale and a lot of experience) and I lost 2 killed and 4 damaged (doesn't show in the report but in the combat resolution). A key variable is the attack took place in a blizzard which seriously reduces the impact of AA, of bombing and also the number of my planes that hit the target.
You lost 7 to flak, they have an armour rating of 0 (Il-2s has 2), in clear conditions, I lost 6 using a plane optimised to the role. So I see little unexpected in your result and a lot that you could improve on by thinking about the allocation of plane types to role.
Now lets look at your artillery. Don't know how many guns you had but I doubt it was 4,745. The attack I've shown is not one I'd do for real but its informative.
Set the combat resolution to 5 and you will see the sequence of the battle. In my case, a lot of those guns fired, but missed, others disrupted the enemy but inflicted no direct losses. Now why did my guns miss? Mainly experience, I've only just been able to raise artillery divisions and they are suffering for low exp = low efficiency.
In truth that attack succeeded as well as it could have (the German cv stayed static mine doubled), I still got nowhere near the 2-1 (even if I had the rare trebling of cv), but there are a lot of tricks around the managing of units, leaders, support units that can optimise your chances. I suspect you are missing the importance of morale, experience and fatigue as all feeding into the outcome
