He's basically saying that when he doesn't win fights it's within the code and pre-determined to make him lose- when it's based on RNG every hit.
If two users have the exact same stats then there is no argument. If there was a significant different in hit ratio success rate in a fight with someone with lower defence and someone with 99 defence, then he may raise an eyebrow.
The statements he has brought forth thus far has no indication of being a problem with the game's coding, rather, shows he's being a whiney bitch for staking his bank away.