They don't get Action Surge, Second Wind or Fighting style. Not heavy armor.Sure, I know that, but you're still a martial character so you're going to know how to fight. How is your example showing they can't fight as well as other fighters?? Some of the Super Strength features would have you fighting better than other fighters. So, not only are you Super Strong but you fight just as well...
It's just normally attacking. With higher STR/DEX/CON.
Large creature weapons normally have disadvantage. Not for the STR demigod.Level 4, what are "larger" weapons? Instead of criting all object, maybe you are siege monster?
CON/CHA to be neutral between strongmen, speedsters, and tanks.Level 6, wouldn't you likely begin with STR saves?
Well it's not the real writeup. Just a quick example. I made it purposely tame here.This seems pretty tame actually, but again I see nothing that indicates you aren't as good at fighting as other fighters, and with your Super Strength you are better in a few ways.
In my notes you get 10x carrying capacity at level 10. And 100x at level 20.
But the class wouldn't get many attack buffs. The CON tank demigod might have better AC but it would get zero offense from base class.