It is not an easy task for old people to see young people sort of spending their time on useless things , in their opinion .
It is not easy for old people to see young people spending their time doing things that , in their opinion , are useless . It is not an easy task for old people to see young people spending their time on useless things , in their opinion . It is not an easy task for old people to see young people spending their time on things that are , in their opinion , useless . It is not an easy task for old people to see young people spending their time on useless things , in their opinion .