Why everyone succeds in life except me is it normal to feel like that? How to stay positive despite that fact?

[Mysticality]

[Vanidal]

It is normal to feel like that.
Change the narrative, it's unfair to compare yourself to whom has different situation than yourself. Only compare yourself with your past self. Are you in a better situation now? As such.
See from different perspective. There are some who are less fortunate, have more failure, etc. Be glad that at least you are not these people.
See and take care of things still in your posession, what you still have.
Acceptance on things outside of your control.
Just say to yourself what you would be, and do what you have to do.