A sever just opened and tge is 5 lvl 25 castle you would have had to spend at least $2,000 to have a level 25 Castle WW2 Guild has five level 25 Castle I believe you need to look into their account because they're attacking active players a total of 60 times every time they attack and they're attacking a low-level Guild
There are people that spend $11000 to get them (crazy to upgrade) heroes to gold so spending $2000 is nothing.
P.S. There are bullies in every kingdom it is a war game and as they say everything is fair in love and war
P.P.S. There are many things that cost lot more than $2000 (if you count cost to take things to their max stats/level) in this game so be careful not to get addicted to this and loose all your money.
This isn't hacking, it's just big spenders. They'll get tired when they run out of money and usually don't have any skills You get bigger castles attacking lower to get more kills or just for boredom. Put up a shied and shelter your leader, it'll be fine