Billions of reserves being used to prop up Weak SGD

Why is the SGD weak? How long has this been going on?  All along I have been proud of our strong dollar. Now the report says it's been propped up using the reserves?? 

I thought Singapore is supposed to be progressing?  Back then, it was said foreigners were necessary for economic progress. Recently, it was reported that economic progress has been due to export activity.

Now it's reported the SGD has been so weak, so much of reserves (US$34 billion) has been used in just 6 months. In other words, Singapore hasn't been doing well?

Then what have Singaporeans been tolerating the influx of foreigners for? Which part about foreigners has been necessary for economic progress? What the heck has Singapore been doing?
 

https://sg.finance.yahoo.com/news/billions-reserves-being-used-prop-042600873.html

In six short months, reserves have fallen by the equivalent of 11% of a full year's GDP.