Stego is probably one of the BEST raptor counters in the game, hands down. You get the slowdown from the Thagomizer attack, and the additional slowdown and damage from the superiority strike. It’s no wonder people are levelling their stegos so high.
Also, Stegoceratops is a very useful hybrid. Unfortunately, it doesn’t have the status cleanse of superiority strike, so it can’t negate any status attacks. but for what it lacks, it more than makes up for in brute force. Another reason people are grabbing all the stego DNA possible.
It’s not necessarily hackers in this case, although if they are so far ahead of your bracket to be almost impossible to beat, that could be a sign of a hacker or spoofer that has bloated his/her stego with tons of ill-gotten DNA. (I know Ludia said that spoofers/cheaters were going to be banned, but we only got to see them banned for 24 hours with no reset.)
Keep levelling your Stego. You’re gonna need the DNA for either hybridizing later, or levelling it for max damage.