The top source inside West Ham has made the Julen Lopetegui situation and their big worry perfectly clear ahead of the Premier League clash at Brentford. If Julen Lopetegui thought his start to life at West Ham couldn’t get much worse, he was proved wrong last night. After his self-confessed tactical clanger resulted in a dreadful 3-0 defeat at home to Chelsea at the weekend, West Ham went to Liverpool in the Carabao Cup. There were signs of improvement in spells as the Hammers held their own. But West Ham’s woeful defending continued as they shipped another truckload of goals to lose 5-1. The…