Why do I feel as like I’m bad at everything I try. Why do most people I meet push me away

Hi, Im a autistic 14 year old and I have 2 questions about stuff I’ve been experiencing recently

1. I’ve felt like I’m bad at everything I try or used to be good at and I’ve noticed it’s been making me significantly worse at things I used to be good at, I don’t understand why I feel like this and why it’s effecting me this way.

2. I’ve noticed the vast majority of the time I meet somebody they either push me away before / after learning I’m autistic or kept me around just to ghost me after a week or two, i feel like an outcast as a result of this and I’ve stopped speaking to anyone outside my close circle or asking my friend to go out unless pushed by my parents.

If anyone knows why these things are happening and how to revert them I’d really really appreciate any support that you can offer,
Thank you so much😊😊

(sorry if this is worded bad I’m really bad with writing long things)