I also wish Brachiaridos would stop cluttering the forum.
Apologies that I'm a better player than you, but what you'd like as crutches and reality don't correlate very well.
(Also please remember that building Ost T1 is nearly half the price of getting molotovs, 150/25 vs 80/10)
Also, how on earth in your hypothetical did the grens get to half health? The cons got MG's and shot at by grens just getting close and one model was busy presumably throwing a molotov.
Also, the MG is still there, can park itself facing the cons and either force them to move around and focus fire it (meaning grens remain still reasonably unscathed and free to use their better DPS than cons at all ranges)
The only way the axis really loses that is terrible micro or leaving that con flank so horibly open they can emerge literally on top of the MG42 and grens because they are directly on top of each other around a blind corner.
And keep in mind all that oorahing and molotovs has run a bill 35 to 45 MU up for the soviet as well. Odds are a higher MP bill for the fight, too.