Sounds like you've had some crappy personal experiences that have changed how you view the world. That sucks, but I don't think it's necessarily an indicator of how everyone thinks. There are so many different types of people in the world, our experiences only show a tiny sample of society.

I'm sorry to hear you have been hurt in the past. That being said, people can sense judgement and resentment in others. Perhaps there are people who sense resentment and judgement in you, and that is putting them off. It might be something to think about. Good luck to you.