people who dont feel good about them self

Its sad when a person doesnt feel good about them self are nasty to other people ....insted of telling them he/she not intrested and letting them down nicely they say nasty things (such as in your dreams)I m sure if they were happy in their life or felt good about them self they would not be so nasty...(but I guess you cant teach old dogs new tricks and how to be nice and smile at the world)