By Jude Summerfield Wayne Rooney says he has little sympathy for Marcus Rashford’s struggles at Manchester United and even suggested the England forward may have to leave the club to grow as a player. Rashford has endured a largely disappointing 2023/24 campaign after scoring 30 goals in all competitions last season, notching just his seventh on Saturday from the penalty spot as the Red Devils beat Everton 2-0 at Old Trafford. Rooney previously dealt with a high level of scrutiny during his playing days at Man Utd and even asked to leave the club in late 2010, though ended up staying for anoth…