The server is online for a very long time and the humanity doesn't get a reset after a wipe.
Thats why there are so many people with so much humanity. Players who play here for years now.
As a hero I am at 2,3 Mio and I play here since ~3 years and I could have much more. Most of the humanity i did in a few months with Balota PVP, like 700k even within 2 weeks.
That there are such high level bandits even helps you, atleast if you're a hero. Kill Splash 1 time and you get like 35k Humanity.
As a bandit the grind takes much longer, because u get (or lose in this case) less humanity for a kill, but you can kill every player and u always make some progress. I also find the bandit weapons at high level better than the hero ones.