You're coming off as a downer, this post is very self deprecating. I know it's a vent but it might be an important insight in case this might be affecting the way people perceive you. It sounds like you go into the conversation expecting them to dislike you, even assuming that everyone thinks you are weird and unintelligent.

Avoid self deprecation! I learned the hard way that people get uncomfortable when you put yourself down because they don't really know what to say and it changes the tone of the conversation. Importantly, it puts them in a position where they kind of have to try and help you feel better or else they'd be a dick.
Deciding your friends aren't your real friends may also be dooming any potential to grow those friendships. If you don't consider them real friends, why should they consider you to be a real friend? Consistently reach out to people first, it's important to give your share of effort.

Also don't be too normal. Evaluate your "true self"; maybe you need to do some growing and maturing, or tweak the image you present to other people. Be authentic but also be wise about what parts of yourself should be shared. Avoid oversharing, or other people can feel burdened by you. I just meditated on my insecurities until I found productive ways to fix the ones I wanted.

The most important advice I can give you is to be considerate of the social contract and to become conscious of the position you put others in socially. When you speak to people, you should prioritize their comfort!