This is inevitability reaching Chelsea club, if you buy bunch of talented young players for cheap to use them as things to resale and make money, treat them as 2nd class because of course they are not ready yet, they want/dream to play regularly for a big club , this is the end result. All of them are not happy want to get out, you dont want to sell them for cheap, SDs got lot of work to do now to make profit, buy a bunch of more young players.