The system was so useless, it quantified the beasts strength using levels but it doesnt indicate how they really level up, the author should at least use exp points as an indicator to show their real progress, plus although the author indirectly mentioed that killing other wild beasts leads to leveling up or strengtening the system still feels redundant without exp points.
Great start and plot, but when you reach the 1200+ chapters the author got lazy and sloopy with the details especially with regard to the system, so many rewards and opportunities wasted and forgotten that the mc did not use. Also the mc became so stupid and dont know how to properly make use of the system it was too frustrating to read.