I'm a BJJ brown belt and I see guys like Sage in the gym all the time, gets by on his athleticism and strength and never bothers to learn good technique. I mean, sprawl, for gods sake...against more experienced guys he is always going to lose in that respect, he's going to get ground out.
TBH his strong point is supposed to be his striking and that kind of sucks too, he never creates enough space for himself, never uses combinations to push people back, let's them control the octagon...He needs to go off and train for another 2 years and then come back.