I was talking to my mate about this last night. We're quite a quiet team compared to others and compared to most United teams I've seen.
when Martial got a red card v Spurs, a couple queried it (Pogba?) but no-one really stuck up for him, pressed the ref to consider the Lamela involvement and I'm sure I remember Maguire (captain) just standing in the penalty area and looking dejected, like "we're up against it now".
I'm not for several United players screaming right in the refs face (though THAT time was fun to look back at) but the ones close should have been stressing the Lamela hit instantly, before he carded Martial, making him at least consider it.
Apart from Bruno, most of them rarely show fight, total commitment, desire to push each other and stick up for each other. Every good team needs some edge.