How many here have been in a credit card debt before or are currently in such debt? Any advice on how to get out of debt in a sustainable way?

Not sure how big is your debt. And not sure what you mean by sustainable. The interest runs every month. Please understand what is compound interest.

Take responsibility and have a plan to clear the debt early if you can. Blaming yourself doesn’t help to clear the debt.

1. Seek help from CCS. They will advise you.
   https://www.ccs.org.sg

2. Look at your expenses and see what you can cut to free up cash for repayments.

3. Sell whatever assets/items you have at home to generate cash to do repayments.