If you think that people have better bodies than you, then work out harder to improve yours. If you think that people are looking at you and talking about you, forget it. Most of them are thinking about themselves. The old myths of superjocks ridiculing and bullying the weaker people in the gym are cliches. No well-run gym would allow that.
People pay to go to gyms to work out.
People in gyms respect other people who work out. You also go to a gym because there are people available to help you, to guide you, to design a program that s right for you. A videotape and a manual cannot substitute for a trained professional who will point out the most effective way to achieve results. You may not see them any other place besides the gym, but they increase the fun of gym-going. When you find the right gym, you will want to go.