Hi Abby. Life has many challenges, like growing up, achieving academic qualifications, getting a job, holding down a job, getting married, raising children, etc., etc.
You will undoubtedly face at least some of these, as you have discovered.
Try to evaluate each experience and determine where it went right and where it went wrong. And learn from this evaluation if you can.
P.S. Reading this post and some of your previous ones, you put me in mind of Holden Caulfield in the book Catcher in the Rye . (This is not meant to be rude, so please don't take it badly). Now I know it's fictional, but as a diversion try reading it and thinking about whether you share any characteristics/outlook with him. It might just help you come to terms with life, and at the same time entertain you.
Good luck :-)