I build my own players, but not from youth academy as I said these players are not very good in terms of their development, I'd rather buy some good talent off the auctions. But when only bots (Nordeus) put the players for sale, it is also not easy to find many good players there. Likewise it wouldn't be an improvement when players put their players up for sale as we would also only have slow trainers from YA on the market plus older players (some maybe with nice skills).
So there is no real solution to the problem, you need to put a lot of time into the game to find the good talents and that is unfortunately what Nordeus want you to do. I would be willing to pay some more token to reduce my time spent in the game watching the auctions but only if it is for a good deal and youth academy didn't provide me this.