I know it's easy to think of those disastrous what-ifs, Tiffs and feel unsettled. However, I hope I can settle your mind, at least a little bit, with a few facts:
- The bad crashes where everyone, or mostly everyone dies get much more press coverage and documentaries because they're so dramatic and shocking - and sells lots of newspapers and documentaries... However, they're only the smallest of percentages of all flights each year, much much less in number and chance that it will happen to you than fatal, or otherwise bad car crashes.
- The vast majority of incidences we never hear about, because the crew acted properly in averting disaster. Also, many things can go wrong in a plane and the built-in redundant systems keep it flying, often perfectly normally until it can be fixed on the ground. There are literally hundreds of these smaller incidents each year that one only reads about in formal aviation logs and enthusiast magazines - my enthusiast friend showed me this a while back, which I found very comforting.
- Losing both engines isn't normally a disaster. It's an emergency for sure, but planes are designed to glide for as long as possible without power and pilots are trained to handle such situations. The higher the plane if this happens, the better. Losing one engine, you'd hardly notice nowadays as a passenger. Even better with 4-engined planes, but alas, only the A380 is left nowadays that has these.
- Stick to reputable airlines like British Airways, Virgin, American equivalents etc and don't go to countries with poor maintenance standards. Don't go to Russia! As if you would, lol.
There's probably more things to list, but this is what I can think of off the top of my head.
Here's a video where the engines were both seriously affected by a maintenance problem at the airport, yet the pilots got the plane down in one piece and with zero injuries. This could have been catastrophic had it not been for the skill and professionalism of the pilots. Most incidents are like this, rather than the bad ones which grab all the headlines and scare people.