Agreed here. Meat harvested from critters SHOULD directly correlate to their mass/weight (both values found in XML) and your hunting (field dressing) or butchering skill. Meat wasted when cooking a single portion size of any food, should be inversely relative to your cooking skill, plus any bonuses from tools and cooking surface.
Agreed here. Only brutes, bosses, or acid spitters should even be able to damage stone, let alone metal or reinforced concrete. Players should not be able to strike harder materials without injuring themselves or severely damaging the implement used. Hardness is one of my greatest pet peeves about 7 Days. AFAIK only the True Survival mod by Spider has even tried to fix it.
Thanks for this most entertaining and humorous post! As others above have stated, perking into Sexual T-Rex, and using lower tier tools may help your situation, at least until you figure out the system or level up. 7 Days is far from perfect release game, but is changing all the time. Let's just hope TFP learn from past mistakes and like the popular title Valheim, re-integrate LBD or some version thereof.
TLDR; Ignore the fanbois hate, and remember to swap hands to conserve stamina

Cheers!