I don’t think it’s necessarily a bad apple in a certain role. When you have a few wrong’uns in the dressing room it drops the standards of everybody.
Rashfords body language, lack of effort, and occasional swipes on social media are appalling but they they keep picking him when fit. It’s completely wrong and sends the wrong message.
Whilst AWB and Dalit might not look so disinterested they are probably not tearing up trees either if the dressing room is toxic. Look at Sancho, he lost interest very quickly and just couldn’t be arsed at United. Once dropped back into a proper squad with proper discipline he’s tearing it up again.
Rashford, Bruno, Casemiro, Antony, Martial, all look like they have stinking attitudes and any decent manager / football director would have shipped at least some of them out by now. The fact they don’t just adds fuel to the fire behind the scenes. They even offered Pogba a last minute £200k/w contract even though he was shite on the pitch and a nightmare off it.
They have to prioritise getting harmony in the squad before adding players.
They just don’t learn.