Sorry to burst Yall’s BS bubble, but what’s the point of trying to pull some photo trick by having the shooter further in the background to give the pig in foreground an oversized view?
500 lb. hog is not exactly unusual, nor are some people trying to pull a fast one.
A 500 lb “wild boar” is pretty unusual. Very easy to get a farm raised pig over 500 lbs. They are penned and fed as much as they can eat several times a day.
It only takes a short time for a hog to go feral. Long hair, tusks, elongated head etc. A true Russian Boar, 300 lbs would be huge. This one looks to me to be not far from domesticated. Maybe 1st generation? Maybe domesticated and ran wild.