wnt, let's just highlight a couple of your points to show that you have no idea of what you're talking about.
And Singaporean policy on compliance with ICAO Annex 1 was that pilots were not even eligible for a type rating on a heavy aircraft until they held ATPL.
This would disqualify almost all First Officers in Singapore and indeed many other airlines around the world. The normal route to ATPL is via the right seat of an airline aircraft, which brings us to the next quote.
However, the MI 185 co-pilot, although he had 2500 hours total, only had a CPL/IR with examination credits for ATPL from his basic training, and only had a bare 100 hours, again from his basic training, that was in command by himself at the front of an aircraft, without an instructor or captain beside him.
You are describing a perfectly normal qualification for Singaporean Airline First Officers. Indeed many will still not have their ATPL subjects with this number of hours. And any pilot in Singapore who joined SIA or Silk as a cadet would only have the command experience you describe, so to suggest this particular FO's qualifications to be somehow substandard is simply being mischievous at best.
Either you are playing on other's ignorance of standard airline practices in order to mislead or, I suspect, you yourself don't understand normal practice well enough to make an educated analysis of the facts.