Life is too short, my heart goes out to you. I can relate to your experiences, I never felt like I fit in either. I wasn't trying to be different, it's just the way I was, but I couldn't figure out why some people couldn't stand me, I was a bit shy and introverted, but I was always nice to people. This happened in other groups, not just the Jehovah's Witnesses, but it was ten times worse at the Kingdom Hall.
What helped me was taking a class in the Meyers Briggs personality evaluation. I realized see that a lot of JWs lwere probably opposite to the type I was, INFP, and that the group as a whole was a type that was my opposite type. My type will always have a hard time fitting into any group, but especially one like the Jehovah's Witnesses. I wasn't bad, I was just different. People who had a different personality type might have an easier time fitting in with others, might enjoy the meetings and field service more and will usually see me as being the wrong one. There is no excuse for people of that type treating others bad, but it's sort of more understandable once you see why they do.
Once I realized there was nothing wrong with me and that I would really never fit in, I was able to break free from the religion. JWs who liked being JWs weren't better than me, they were just different.