Why ??!!

Why is it sooo difficult to comprehend people most of the times !!??!!
Why are things not always the way I would want them to be, or people not really the way I think they are initially !!
Why is friendship such a taken-for-granted relationship ?
Why does it just 'click' so amazingly well with some people and then, when all seems to be going great guns, things just take an unexpected, unwarranted-for turn...and suddenly..its just not the same again !!
Why aren't humans born with remote controls in hand- rewind, play, overwrite and fast forward as you please !!
Why are there so many questions and just no answers ??