"When I am on my deathbed, I don't want to look back on my life with regret."
The deathbed part of your life isn't even that long. Probably a week or something. And probably you'll spend much of it being distracted by morphine and excruciating pain, leaving no room for feeling sad about how shit your life was. Maybe you should just tell future-you to suck it up and let you play your xbox in peace.