Why is it like this? why why?

nobody in this world is true and perfect.whenever you try to do good things in your life you are always stop by the negative energy.our karma is a mixture of positve and negative energy.our mind is mostly ruled by the negative thought and it is very difficult to come from this phase .world is unbalnced again the rule of negative energy and the karma of each and every person is responsible for that .we can't control our mind but we control our thinking to some extent .this world is never be perfect and that is true .