80% of people above 500 are frauds. Majority of their 500 achievements are centered around 2018 June which is when the exploit took place.
https://www.dataforazeroth.com/leaderboards/honorlevel
Primary issue here is that Blizzard lost their spine and sends a clear signal to everyone “Exploit early, exploit often.”
Honor Level system would have been a cool system if it wasn’t infested with cheaters.
If it was up to me i’d scrap the entire system and make a new one.