Does any man have the right to dispose of his own life? This is the ultimate question of moral entitlement, and relevant only if right is relevant in this context, and it is not. A suicidal man cannot be concerned - and nor should he be - with questions of moral entitlement. (And how absurd.) His one concern should be whether self-execution will most expediently relieve his suffering.
Secret elisions within families are suddenly revealed by self-execution, and just as quickly sheeted with excuses, blame, and counter-blame. But sense is made of the world only through relationship between action and reaction, symptom and cause. No change is possible without analysis of accountability.