Agreed, the thing is mg 42 needs a spotter to be effective that's a whopping 2 units to fulfill a role it should be capable of itself. If you have no line of sight from a spotter with the MG it wont last even 1 squad of scripts would make quick work of it running face on with no flanking.
To some others claiming skill , i have no doubt hans is a good player however that video was only made possible with the crazy fast set up time of the maxim. While playing soviets I can do the same with ease its not hard to do. It could be that the maxim is not overpowered but the MG 42 is under-powered.
2 units to fulfill a role? it's not like the other unit(grens usually) disappear, they are still there grenadiering the shit out of everything.
btw, being a support unit implies that it can't run the show by itself (the Maxim can't either btw).
if you get molotv'd by conscript squads running in your face consider playing some tutorial.