Scotty, it was more so, if you're talking about the cannon rounds. It's the puffy ack we dislike.
In real life a group of tempests running at full speed with surprise on their side made one pass over a German field. Of the entire flight, the leader looked back and found only 2 made it through the fire to the other side!
The gun fire was quite lethal. It's the 88mm and/or the 5" puffy that's not very realistic right now.
Only correction I'd make is that surprise was not on their side.
Day Ranger Mosquito flights regularly attacked airfields in daylight, but one pass only as the guns were never ready the first pass. Second passes would be too dangerous.
Of course, the AI is never surprised in AH, so....