All hasn't been lost with Jeremy's education such as it was as he's enabled it to be turned into a more positive form by all the studying and learning that he's managed to do since those days. A study which is miles away from the norm but which will prove effective in his forthcoming release.
The tragedy is his Gresham's days prepared him better for incarceration in prison than working life on White House Farm. I don't believe this crime was inevitable: there was the interlude at Little Chef, where he was trying to find his own inner self, not forgetting his two years at Chelmsford College where he rendered a good account of himself, offering lifts to fellow pupils in the less stuffy atmosphere evoked by public school.