is not realistic a hare give the same amount of meat than a deer, rabbit must give 2 kg of meat without bones, a deer something around 200kg of meat,
amount of meat
I agree that it is not realistic. That said however, the way the system is set up right now, if you are hunting to eat the meat by itself, it is just meat, but each type of meat has other purposes. For example, some are used in recipes, and others are used to make traps and lassos. It may be difficult to make the change in quantity of meat obtained from deer and large animals because then the other systems would need to be reworked. Also, the way the game is set up right now, the reasons for hunting deer, predators and other large animals is not for the meat but for the hides, heads, etc., a piece of meat is just a bonus.
Lastly, I think increasing the meat from large game may have an affect on balancing issues within the game and make hunger and survival less important which is a major part of the game. I could see maybe 2-4 pieces dropped from large game, but any more would make a very important part of the game trivial. As it stands, there is plenty of food in Wild Terra.
the game is not supposed to be that realistic, otherwise plants would take months to grow, structures would take years to build and your character would never be able to revive.
Just play it and have fun xD
Try to lvl up your skill and equipment you can skin 4 times more meat from deer than from hare.