and a tip for you @ARTstile
Never renew the contract of your players before it ends (when you see that the contract expires).
If you have less than 14 players with contract when the new season is starting, the game gonna give you 32-33 y.o. 3* players for the new season to complete a 14 players squad.
After that, you can sign the new contracts.
With that way, you 're gonna have a bigger (and free) ) roster.
Those 3* veterans really can help considering that your team doesn't have any superb quality.
(and they can contribute in training too).