Unforgiving current

Why is it that its so hard to be happy. That someone or some people get in the way of happiness. Why can't they learn to accept things. Seriously one must learn themselves to not be so nosy and let others enjoy their life. Its like they have nothing better to do with their life. It is like their actions seem to cause an unforgiving current crash; quick violent and seems to destroy everything in the way. One can only hope that things will get better