What are you talking about? Maxim is so bad that the Grenadier can get close to Maxim in the front and kill him with a single rifle grenade, while the grenadiers will not be suppressed.
Maxim is not that bad, surely a grenadier can not get take out anyone in 1 rifle nade unless they are clumped behind yellow cover.
Maxim is ok, just lacks suppression but compensates currently for its damage and 6 man, set up time too. If a grens squad attempted to go for Maxim single handeldly, it would lose 2-3 man.
Maxim needs support, that is the usual case. Conscripts are the ideal choice and engineers. They are good but not that good. Buff suppression and decrease to 5 or 4 man. Set up time is still superior to others which is another upside. The only major downside currently is Suppression.
It is great against units behind cover which Axis MGs are terrible at. Maxim has all but suppression.