it might not even be jc, it might have started since primary
school for all u noe.. or it might be something else dats causing
alot of frustratution being bottled up inside her throughout life.
when she blew her temper, i think she regrets it and that causes
her to feel even more frustrated.
personally, i don't think she is hopeless. but i don't know what
specific actions to take but yeah, she needs your concern and
patience.. and it probably wld take many years to calm her
frustrations.
and you don't go crazy before she does though. lol..