There are only a handful of players in our team that have questionable attitude, martial who gives up really easy, ronaldo who's body language and gestures suggest he is only out for his own glory, rashford who has changed on the field since he became a good samaritan which has made him a big favourite with advertisers. Then there is pogba who comes comes as wanting to be away from the club for some time now, bruno'ish but only since ronaldo showed as I think he thrived on being our main man and possibly lingard but his time at west ham showed no signs of such a thing.
I wouldn't put Maguire, matic or bissaka into this category as bissaka and Maguire are just bang average defenders and matic is just not as good as he once was with age catching up with him