My main point here is that it is foolish to assume that there is any easy way out of life, and so it is foolish to believe those who tell you that they can grant you that easy way out.
Then your main point is flat out wrong, as it is contradicted by pretty much everything we know, from a medical perspective, about death.
Some deaths are vastly more prolonged and unpleasant than others.
Anyone who has had a general anaesthetic knows that the experience of being made unconscious by that means isn't particularly unpleasant. Once such anaesthesia has been administered, any further action that caused death would be incapable of also causing suffering.
Of course, it would need to be done by someone assisting the person who is dying, because an anaesthetised person cannot act to kill themselves.
If I can find someone who will agree to assist my death in such a fashion, who are you to tell either of us that you forbid me from dying in that fashion - particularly when I know that the alternative is for me to suffer a long and painful death?
You are demanding the right to deny anyone else an opt-out from torture. That makes you a monster.