Players Want to Leave Too Easily

Its honestly starting to really annoy me I’m doing a Man Utd career and Alejandro Balde ,Rasmus Hojlund,Destiny Udogie,Bukayo Saka,Yeremy Pino ,Altay Bayinder have all submitted transfer requests and the career has only been going for under 3 years now it is ruining the game for me I’m trying to just sell them and buy them back as I believe that is the only way to get rid of it.EA have had so many continuous issues in career mode for many years now it just shows how undervalued the career mode community is nowadays I thought considering they lost the fifa license they might aim to make the game better and as annoying this is I can see it being an issue for many years to come.The problem is players don’t have enough stamina to play every game when in most competitions champions league,fa cup,league cup,premier league etc so you are resorted to running two teams and this problem continuously hinders it