So recently I've tried recording myself talking as well as recording videos of myself to see things like my mannerism just to get a feel for why others may not gravitate towards me as much as they do everyone else. What I ended up realizing is that, I kinda have a Mike Tyson effect. If you took a picture of me and tried to guess my personality, you'd probably guess something WAY different compared to how I actually behave and it made me realize that maybe that super mismatched aesthetic is probably just jarring to people. It's like seeing Ice Cube but when he opens his mouth you hear Bill Gates (in mannerism, not voice). Nothing wrong with either guy but I can see how the contrast of seeing an intense looking guy like Cube but hearing someone timid like Bill would be subliminally off putting. Something about it just feels off yanno. Like getting a Hellcat with the performance of Mitsubishi Mirage. I also tend to take weird pauses in my speech that others don't really do. I knew I tended to pause but I never realize just how long I'll stop talking for. So that's another thing to work on
If you feel like reinventing yourself, it's a good place to start because we usually aren't aware of how we interact with others. Our brains will rationalize a lot of things, so you could be behaving in a way that others find peculiar and never realize it