^That was a case of a broken heart.
This happens a LOT in the trans community... people lose spouses and children due to transition, and basically they don't realize what they had until it was gone. And they fall apart when they lose their intimate social network.
If you'd like to see another telling statistic, how about this one?
In a 2012 study of 433 trans youth, (
http://transpulseproject.ca/wp-content/uploads/2012/10/Impacts-of-Strong-Parental-Support-for-Trans-Youth-vFINAL.pdf) 75% of trans individuals with unsupportive or somewhat supportive familes exhibited symptoms of depression, compared to only 23% of those with highly supportive families. And 57% of those without family support attempted suicide, compared to only 4% of those with support.
The issue in so many of these regret cases, and cases where people kill themselves, isn't being trans itself, it's the social rejection and stigmatization that goes along with it.
(Side note: is there any particular reason why you seem to be transfixing on these negative outcomes so much?

)
Also, you asked me to provide where in the OP's linked study it talked about the difference between the 1973-1988 crowd and the 1989-2003 crowd. Here it is: (Direct quotes from the study:)
"Table 2 separately lists the outcomes depending on when sex reassignment was performed: during the period 1973-1988 or 1989–2003. Even though the overall mortality was increased across both time periods, it did not reach statistical significance for the period 1989–2003.""In line with the increased mortality from suicide, sex-reassigned individuals were also at a higher risk for suicide attempts, though this was not statistically significant for the time period 1989–2003.""Transsexual individuals were at increased risk of being convicted for any crime or violent crime after sex reassignment (Table 2); this was, however, only significant in the group who underwent sex reassignment before 1989.""In accordance, the overall mortality rate was only significantly increased for the group operated before 1989. However, the latter might also be explained by improved health care for transsexual persons during 1990s, along with altered societal attitudes towards persons with different gender expressions.[35]"