Can you code or are you looking for a non-coding role?
If you can code, the path back into tech from a lost decade is pretty straightforward - practice up on coding interviews, spam enough companies with resumes to get interviews, then do well on the interviews. If you can ace a coding interview then people will overlook time in your past that you spent unemployed or working for failed companies.
If you can't code and don't want to then I'm not really sure what to advise. It depends on what sort of job you want, exactly.
If you can code, the path back into tech from a lost decade is pretty straightforward - practice up on coding interviews, spam enough companies with resumes to get interviews, then do well on the interviews. If you can ace a coding interview then people will overlook time in your past that you spent unemployed or working for failed companies.
If you can't code and don't want to then I'm not really sure what to advise. It depends on what sort of job you want, exactly.