A quick mod made in the CK to change the player damage multiplier for the very hard difficulty
from 0.5 to 2 works like Realistic Survival Damage.

Added a new optional file for the "Hard" difficulty, it increases the damage dealt by the player from 0.75
to 1.5, to match the received damage.

Install using NMM 

You can make your own version if you like, this is how:

-Open the Creation kit and go to: file -> Data. Select Fallout4.esm and press ok.
-After it loads go to: Gameplay -> Settings  and search for fDiffMult
-Make the adjustments you like by changing the numeric values.

-fDiffMultHPByPCVH : Multiplier for damage dealt by the player in "Very Hard"  (vanilla 0.5)
-fDiffMultHPToPCVH : Multiplier for damage dealt to the player in "Very Hard"  (vanilla 2)
 
-Save your mod.

EDIT: I am not sure if it works for the new Survival difficulty, I will test it.
These multipliers can be used for the new survival difficulty
-fDiffMultHPToPCTSV : Multiplier for damage dealt to the player  (vanilla 2)
-fDiffMultHPByPCTSV : Multiplier for damage dealt by the player  (vanilla 0.5)
Also these Actor values apply, they can be found using the object window
 HC_OutgoingDamageMult (Vanilla 1.5)
 HC_IncomingDamageMult (Vanilla 2.0)