Spice Jet Airlines — spicejet emergency landing issues

I booked the spicejet flight sg 3466 for my parents from coimbatore to bangalore for travel date 11 apr 2018 departing at 12:40pm with pnr ibfmvt.

Midway the flight experienced fire issues and smoke was filled.in 15-20mins they did emergency landing at bangalore airport far away from help. Help reached after 5-10mins in which the passengers where asked to jump through emergency exit.

Now i ll list down the complaints:
1. This is not the first time spicejet flights have faced this sort of issues. Are they not doing any health check of the flight before the departure???
2. Even if its a short run flight why oxygen masks are not available in the flight?? My parents where choking during the whole time.
3. They got their life back but they are injured severely because of jumping through the emergency exit which is too high for aged people and my dad is even having disc dislocation issues. Why there was no landing beds available?

Why are they even running the flights with out any emergency life savers.