I've looked into other methods and none really appeal to me I don't want to jump from a building or in front of a train or anything like that, I liked the thought of OD, hanging or Carbon Monoxide poisoning in my car, the thought of leaving is the only thing making me happy
The problem with OD is it is no where near 100%, and many times it is painful.
The problem with jumping from a building is you need a high enough building, and you have to land right. Otherwise that also isn't 100%
Jumping in front of a train not only isn't 100%, but you now made a crap ton of people mad at you
CO2 isn't good since that isn't painless or quick. Even more since it is from your car.
Like public stunts will cause more problems for you if they don't work. OD is basically flipping a coin on what will happen and how painful it will be. And the other, you might as well mix bleach and ammonia to make chlorine gas. That or put a bag over your head and go out due to the CO2 buildup. Both are no where near fun, and isn't as nice as the movies make it out to be.
For the average person, I believe the only method that has no pain involved is an exit bag. It is a pain to get all the things. A tank, a big enough bag, and so on. But it is possible.
If you didn't know, an exit bag you're basically replacing the oxygen with nitrogen, and your body thinks it is oxygen. So you don't get a survival kick like you would with CO2. Assuming you're taking in pure nitrogen, you will be out/sleeping within 1 to 2 breaths. Within 20 to 40 min, you would be dead. Due to this, a person doing it right will have a much higher success rate than a bullet to the brain. Now how to setup everything, you will have to do the leg work.
IMO it's incredible on how hard it is to have a painless quick death