U gain some morale by winning matches and ur player perform well. I seem some drop in morale when i win but the player had a bad rating. I think u gain morale pr stay the same when loses but player did well but im not sure.
Morale boost is easy to gain just watch the game. Plus 2 boost is 100% back to morale. I wish it was the same with the stamina boost. Lol
Good luck.