How can I improve my people skills without being ridiculed or offended?

It sounds like you have found yourself in a toxic work environment. The way your co-workers and managers treat you is not right, and you shouldn't have to subject yourself to that. Learning to be more of a people person isn't easy, and it's not something that will happen overnight. There are tons of self-help books out there that will help you on your way, and like the person above me said, the best way to become more comfortable around people is to actually BE around people. It would help if you spent more time with your friends that you do have, or just go out to social events and learn a bit from watching others and being around strangers in general. You're never going to be employed in a workplace where you'll get along with everyone there.. that's pretty much impossible. People's personalities clash and there will always be no matter where you go. You might even benefit from seeing a psychologist/therapist. They have excellent programs designed for people who do not have the best social skills/ are not comfortable around people. You'd be surprised at how much you might benefit from a little group therapy. In the meantime, find another job where people respect you. I think you should look into it. Good luck!