Use your brain. TenZ had insane mechanical skill, so he diffed everyone in a time where mechanics were everything. TenZ in his prime is worse than he is currently bcuz now he actually understands the game.
“How hasn’t anyone broken his record” refer to before: easy to get high acs when aim is everything and you’re the best aimer. Put DSG yay in tenz prime era and he drops 450 acs easily.