SP tactics presented by You when playing “Baupte” chapter could be used very efficient in un-modded version of EiB.
However, when using Rendroc’c WarZone mutators, You will need to adjust Your tactics accordingly, due to the high level of difficulty delivered with his mod.
I must say, that the first part of the mission (outside Baupte) played by You was better than the rest one - You used Sherman as a cover, which is a very good strategy (except standing on top and shooting from MG - one random enemy bullet and You are dead plus the Browning is not a very accurate weapon with that recoil). Unfortunately, there are some drawbacks of such strategy: one single Panzerfaust could kill You when on a tank or close to it. You had luck in 14:45 - that Panzerfaust flying above Red’s head - that was close! 
As for the moments, when You acted too quick and un-prepared for an assault (or performed from wrong side):
-> 24:38,
-> 27:30,
-> 28:14,
-> 28:38,
-> 39:40,
-> 44:00,
-> 1:13:00.
Those are only examples, I saw more such moments on Your Baupte video.
As for using FG42 as a main weapon in close combat - well, in my opinion FG42 is too big to comfortably operate in close combat - I prefer instead i.e. MP40 or M1A1 Thompson.
I have a one simple rule when playing SP with Rendroc’s WarZone mods: You need to behave just like You was Red or Baker himself (not just a player far away from the fight). Would You i.e. risk You own life to perform suicidal frontal attacks willingly? Of course not! (I hope so).
Cooperation is a key too success, even when the US squad AI in BiA:RtH30 and EiB is not always working as it should
.
In my case, I am using AntiTank_DamageScale value set to 10.0 in CustomWeapons.ini, so I must be perfect when facing enemies with Panzerfaust, field guns or tanks: one shot and my tank is a piece of scrap. However, the same rule is applied to Germans as well ;). This is the best choice for the close combat in “Baupte” chapter in my opinion. Try this setting.
I am also making sometimes all of those mistakes made by You during playing “Baupte”. This is the effect of being “too fast” in playing the game and losing patience. Before making any move, there is a need to think twice (or even triple) about possible consequences in RtH30 and EiB Single Player
.