I spent many years working with young adults with learning difficulties, from those with autism to Fragile X syndrome. Amongst them were several with FAS.
So, learning difficulties, social awkwardness, attention span deficit and yes, some aggressive tendencies were displayed. That's not to say all of these young people were incapable of achieving good things educationally. Some managed to work their way through intense personal challenges and gain academic qualifications - some were excellent artists and craftspeople.
Adolescence was a particularly tough time for most of these young people;some found it hard to cope with the hormonal change!! Of course everyone is unique so some will need extra support at certain crucial times whilst others mature in a relatively stable way.