Do you think that we encounter 'bad' people in our lives?

And is it naive not to think so?

I have a hard time judging people as bad because as a person, all I have truly as an example is myself. I am fluid, naive, hopeful, emotional… I can’t box people into being bad and let them go off my life. However this mindset is hurting me as I am seriously confused by how certain people I get to know behave, lie, cheat, deceive and judge endlessly and still think they’re better than most.

Do bad people exist?