"I know I'm not alone in this, as I've seen a lot of complaints from only SEA folks about the same issue."

Yes, I'm fully aware of the possibility of this could be my ISP problem, but quoting my statement above, this is not a problem from a single ISP from a single country, it's whole region with a different kind of ISP.
tbh i just need some clarity of what could be the problem that causing this.