Humans are not inherently bad beings, but the sharp increase in various problems in the social life of the modern world can very well make the rules of life more selfish and cruel. Only the elevating power of enlightenment can prevent this.
If you acknowledge that to be is better than not to be, that is, existence in principle is wonderful, then the very least you should do is be sincerely grateful to the Universe, all our ancestors, teachers, and parents.