TS (and anyone in the same situation as him), have you considered retraining in a different field? Here are some links for you to explore:
https://conversion.mycareersfuture.s...spx?source=PCP
https://www.ssg.gov.sg/wsq.html
The best part of this is that the government would pay for your education if you pass the interviews.
活到老,学到老. If you constantly upgrade yourself and keep a good attitude towards working hard, I believe there will always be opportunities for you.
All the best bro.