Does not matter if he is abusing the system or not,  he is flipping players.  Look at the date he  bought players and sold them. That's called flipping players/ Dont  make excuses man. Money is money, it all add up after a while.
 I never said he had any advantage over me  if so  where is it? You said  that. I said he is flipping players. Your mad because you tried to personal attack my team  and me and I  told you this guy is flipping players.  Comical.. if he such a good team  why does he have to  flip  75-100 players in 3 seasons time. To me that's called struggling..
But to you that's called good manager  no, no hold on good trainer.  Comical at best. I had the same team for 10 season  time and bought  a few new players.  I never flipped any. I have never rebuilt the team, not once.
Then, as I said, list five players that he's "flipping". Buying a player, using him for a season or two and then replacing him is soimething entirely different. Buying a short term scrub for scrimmages and then selling him quickly for roughly the same price is hardly flipping. 
But you're saying "money is money" and that it all adds up? You mean to tell me his 188k career profit (on 3.5M sales roughly vs. 3.3M purchases) in three seasons is an overwhelming advantage? I seem to recall you boasting of how much money you made while in V, "learning tactics" and all that. 
I've never really claimed they were a good trainer though. I don't know how their centers have been trained, but what I do know is that they have been. Hu Dunwei was drafted and joined Harbor four days later, and now has an 11k salary. Eron Hotič was drafted, joined Harbor eight days later, and now has an 11k salary. Neither is a high potential player, but they're better players than when they joined the team and already both are superior to any player you personally have ever trained. 
But, you know what? Why don't you go look at the SM Lizards and come up with some sort of excuse for why they've also beaten you and have a better record. They've sold one (1!) player ever. They've run an inside offense a total of one (1!) time in their entire BB career. Of course, they're training some of their own draftees too.