The point was that the Bills defense is great, they give up the least amount of points in the league. Revo claims that Josh Allen has no help, so the running joke is to point out how good the Bills team actually is.
"Victimized". They are 10th in the league in yards allowed per rush. Their "weakness" is a small problem considering the NFL is mostly a passing league now and their pass defense gives up almost a full yard less per attempt then the #2 pass defense. Elite pass defense + above average rush defense = Great defense.