What are the career-path for failed PhD student?

I was pursuing PhD in mechanical engineering. I have completed 4 years. My PhD problem was very tough and my professors told that completion of PhD requires 3-4 more years. Also, no funding from the university. So, I decided to quit the PhD programme.

Now, I'm Jobless. I have several options, like joining a new PhD programme or Academic job or industrial job.

Can I have suggestions based on your experience?

Thanks.