I suppose different people have a different definition. To me a true hunter is one that whatever their pursuit may be, treats mother nature, their fellow hunter, and their intended target with the utmost respect and when successful takes care to make a clean, ethical shot, and wastes not. No one is perfect and things go wrong sometimes and if you feel deep remorse, you should.
There are many out there that kill to kill, cut the head off and leave the carcass, claim anothers kill, disrepect landowners and other hunters by their actions afield, and the list goes on and on all so they can post up on social media to thump their chest and brag. To me, these are not true hunters. But to each their own I guess.