I believe those who expect others to forgive them to the point of getting angry when they aren't forgiven,have not been made perfect in love.
To be perfect in love,you love your enemies Even when they hate and try and kill you. It's agape love that Jesus displayed. However it's not natural to us and some thing the Holy spirit has to teach us.
.it's easy to love those who love us and are nice to us, but love our enemies and truly bless them?
That takes supernatural power from Heaven and a forgiving heart.