*facepalm*
You did not just compare reality to a video game...
I've never played H&G and I don't intend to, because I don't approve of their "pay to win" gaming model, but let me tell you, as somebody who has been in the army since 2006 and in the reserve since 2009, the most realistic computer game out there (and that would be the ARMA series, btw) does not even begin to reconstruct what it actually feels like to be in the field, so don't you dare paint yourself as an expert on the basis of "having played a video game".
On the other hand, I can also tell you I have also been doing reenactment and I've shot pretty much everything from a black powder muskets and up to machine-guns, including, yes, the Dp-28 and Mg42, so I am intimately acquainted with the subject matter.
The German scout car you forgot is most likely a SdKfz 222, and that's off the top of my head, without having to look it up. It's armed with a 2cm autocannon and a 7.92X57 Mg34 and in real life would also have an anti-grenade screen on the top of the turret.
Also, am I right in supposing that, in the game, there are only two people in the scout car, one driver and one gunner, and that all the hatches are open, including the anti-grenade screens? Care to guess why that is? Let me tell you - it's so players would have a chance to disable the car either by sniping the crew or by throwing a grenade inside, instead of dying pointlessly, getting frustrated and robbing the game company of their profits when they finally give up.
Well, in real life, there would have been three people in that car, because there's also a commander/radioman which keeps a constant 360 degree watch around the vehicle and informs the gunner what's going on. The hatches and anti-grenade screens would be down, so there would have been no sniping the driver or throwing a grenade inside and, unless he was a total idiot or really overconfident, the commander would have seen you approach long before you got anywhere near the vehicle and either told the gunner to take you out or shot you himself with his Mp38/40, that's assuming that the vehicle was alone and not followed by infantry as it is normal.
Sure, you could still have taken some of the crew down if you were really really lucky, for example if you stumbled upon a single armoured car, alone in enemy territory, they stopped exactly in front of your hiding place and all of them were looking away, but do you know just how incredibly lucky you would have to be to take them all out, when all it takes is a fraction of a second for one to turn their head and spot you?
And if you manage to shoot one, do you think the others are just going to sit idly by and not drive away or turn the turret? Ler's suppose you made it to the vehicle unnoticed. Do you think you have the stamina to clamber on board when you're tired from carrying 20kg of equipment all day and winded from having run over to the vehicle? How about climbing quietly and aiming your gun when your heart is trying to burst out of your chest with exertion?
I'm not sure this is something you would be able to do in real life, so quit trying to tell me "it's easy" because "you've done it in a video game".
Let me give you a quick tip - stop trying to pose as an expert on things because you played a video game, because it merely makes you look incredibly stupid.