How would you make the decision that right now is the time to kill yourself? If future you can't wait one more day, then why didn't he do it yesterday? I think

How would you make the decision that right now is the time to kill yourself? If future you can't wait one more day, then why didn't he do it yesterday? I think there would be a general decline in life quality but with ups and downs so you'll never know if tomorrow will be better than today so there may be no clear point when you're sure you don't want anymore. Once you've lost too much of your mind to really know what's going on, you're not someone who should be trusted to make that decision- just as we don't think mentally ill people should be trusted with that decision.