This is absolutely horrible, but this stuff isn't exactly happening every day.
In Việt Nam 20 years ago there were a lot of Chinese scoots, gas, of course, but they fell apart pretty quickly and were eventually just bought so someone who got a job had some transportation until he made enough money to get a Japanese, Korean, or Taiwanese bike all of which hold up very well. When the electric bikes came on the market about ten years ago they were and are almost all made in China but have no exploding battery problems that i can discern. Perhaps it is because they are relatively weak compared to better brands.