My guess is you are jumping to negative conclusions about yourself based on incorrect assumptions about how hiring works. How many jobs have you applied to? How relevant are they to your qualifications? Rejection rates for jobs are very high, and it's common to be rejected for multiple positions.
You might also want to look at other factors such as your interview style, perceived ability to focus, fit with a company's culture, and other factors that also highly influence hiring decisions.
And finally, instead of thinking about, "What doesn't anyone want me," why not think about, "Who would want me and why?"
One thing that could matter that I am looking for a remote job from a third world country while even most of the remote companies say they hire candidates from everywhere but it seems their primary choice is US and Canada or Europe. You can read my story here, https://medium.com/@msuworld/desperately-seeking-a-remote-jo...
This stuck out as me as a red flag: "I can do any kind of technical support, virtual assistance or project management type of job."
People who say they can do it all are usually passed over because people usually can't do it all. Make sure each application is tailored perfectly to each position. If you are applying to project management, edit your CV job descriptions and application to focus mainly on project management-related stuff.
Don't say you can do project management and customer service. Hiring managers get a lot of general applications from people promising to do it all, when in reality they just want to determine your suitability for the position they have open in their other browser tab.
Can you share more about what your background/skills are, what kind of work you're looking for, etc? Maybe somebody here could help you if you do...
You can find more details about my experience here,
https://medium.com/@msuworld/desperately-seeking-a-remote-jo...
*just a hint there are to many but's in the early introductory paragraphs of your post.