In the US, you can push back at things like unsafe conditions with threats of OSHA. I doubt there's any such thing in Bangladesh, but it would be a good start.
Having a job is great, but they should be required to provide reasonable working conditions. And even in the USA, they will do the absolute minimum unless pushed.
Source: I have worked 16-hour shifts in a US factory that was over 100F, sometimes unable to get lunch or bathroom breaks. I now work a normal office job and laugh at the very notion of comparing even a 100-hour week doing this to a 70-hour week doing that.