Nick hasn't won a fight in ten years. Fighters do not get better as their bodies age (without peds). People feel pity because he was abused by USADA and his career was cut short. His don't give a F attitude and volume punching style of fighting also helps. He managed to win against some legends too (who are now all retired or almost there). The hype train is real. It's likely he will get destroyed in upcoming matches if he decides to fight against younger, prepared opponents.