"Mental fragility" refers to a person's psychological state being easily affected or influenced by stressful situations, leading to feelings of vulnerability or instability. Full definition
No outfield player bought till the winter, injury after injury and mental fragility in big matches. (justarsenal.com)
ALL of Wenger's squads since Invincibles have been plagued by the same mental fragility, and the suddenly drastic dip in form for no reason whatsoever. (justarsenal.com)
Yes we had those catastrophic away results but logic suggests that mental fragility rather than team personnel was more the culprit. (justarsenal.com)