the suit trousers need more tapering especially at the bottom. they are flaring out and its not flattering. you are slender and definitely need to have the trousers looked at.
in the first pic with the SC and denim, i appreciate the look although a simpler shirt might have done you justice and the pocket square is a little out of place.
welcome to SF
It is a vintage suit, seems to have a boot cut or flared bottom... tapering would ruin that look. For some reason, I really like it...