Nothing new under the sun. ISTR we had this conversation at least 15 years ago.
I posted then that I was a practice manager for a group of doctors in Leicester. They had two homeless hostels they looked after and asked me, as an ex-squaddie, to try and chat to some as there was a rather large ex-servicemen percentage among those dossing down.
Both hostels had about 80 beds and the proportion of ex-servicemen seemed to be about 60 of them.
I had a chat to most of them and found that only 2 had actually done more than a year in the Forces. Others had "applied" to join and been turned down but still classed themselves as ex. More than 20 had turned up for basic training and either opted out or were booted out before training finished. I think, long time ago, that a dozen of them had gone through basic and then binned, or got binned, on the next phase and most of those were for drinking or psych problems.
Only one had actually served at least 6 years and was being treated for PTSD due to being on Galahad in the Falklands. Funnily enough, he was the only one who made an effort in the morning by washing and shaving etc.
Out of the 60, just two were genuine "veterans".
The hostels may not be the best examples as the rule was anyone obviously on drugs or in an inebriated state were not allowed a bed for the night. They were given breakfast at 8 in the morning and then had to leave and couldn't book back in until 6 that evening. Quite a lot would hang around the bus or train station with "ex-serviceman" cards and begging.
My conclusion to the doctors was that the vast majority would have failed in life as they did in the Forces.