How we perceive people, is how the world becomes.
There is a proverb in Sanskrit that goes, Yatha Drishti, Tatha Srishti. The way you see the world, that is how the world becomes for you. If you see the world as full of horrible people, You will experience that also. If you see the world as full of good people, even in the worst criminal you will see there is a very nice person hiding deep inside him.
We are very fast in judging people or labeling them as good or bad. Know that these are just temporary expressions of someone's mood, situation, like we have. There is no bad human being created by the Creator. Somewhere everybody has a light in them, but it's maybe hidden. In some people it is maybe sleepy, and in others it is more in action.
So these are the two paths. See in your mind which side are you going. Are you going towards trust, or towards doubt? If you are going on the side of disliking others or disliking yourself, then it is time to give a shift to it and say, "No, intrinsically everybody is good."