Everyone on this planet has value and potential. Some people may squander their value, or use their potential for bad reasons, but everyone has some kind of value.
This does mean that very few people are special, but being special isn't something you can try to be. It's a passive thing that comes of achieving other goals.
To achieve your goals, you have to first learn that you can achieve goals. It's possible you may never actually achieve a goal, but the journey to try and get there can open new opportunities.
It sounds cheesy as hell, but you're on a journey through life. Thing is, there's no actual destination. There's nothing fixed to judge yourself on. If you compare yourself to other people, you'll likely forget to compare a lot of how their journey is different to yours. Both of you are valid where you are, and whilst there are things in other people you may want to copy, you don't have to immediately become like them.
Give yourself time to change what you need to, and be proud of any progress you make. Forgive yourself your mistakes, and look at how to avoid them in the future. If you need any help with any of this, reach out, we are more than happy to discuss what's bothering you and how you can overcome or live with it.