I must say if Trott has had this problem 'for some time' why was he selected to go in the first place.
I may be wrong but this problem seems to be affecting the England team almost exclusively in that Trescothick, Yardy and now Trott have fallen victim but I don't recall players from other countries experiencing the same trauma or maybe others' policy is to keep the news under the wraps.
Trott clearly has a form of OCD, which may or may not be linked. His Saffer team mate has raging narcissism. We take the rough with the smooth with our colleagues.
As for why doesn't it effect other team, well I don't know. As Trott is not a Brit born and bred, it can't be our education system or the usual Daily Mail diagnoses. I know that there was a diary by Paul Gibb of the post war Ashes tour that revealed the torment he was going through at the time, so this is not a modern phenomenon. A number of England players back in the day simply refused to tour.
In the past, ECCC players took their lives because they couldn't play any more - maybe this is a slightly different situation because they were facing poverty in middle age, whilst Trott & Tresco have more support nowadays
As for other countries, maybe we just don't hear about them. However, we all know the problems besetting a certain Kiwi international and Essex club player, who is slowly recovering...