some player are kind of 90% fast trainer, if you spend time looking at the transfer market, you gonna see some 'fast trainer' players with slightly different in their price or quality.
eg. player A: quality 33 price 5m. player B: quality 34 price 5m
=> make sure you got the best guy there, I experienced the same thing here, some player keep doing 40 80 120 when they reach 5 star, some just slow down after they reach 5 star even though they seems to be all fast trainer![]()