From someone who's been there: please don't do anything hasty--except maybe leave your job. The "majors" are uniformly toxic.
Talk to your boss, or their boss. Even taking a totally cynical view of life, they don't want suicides on their watch because it looks bad on their performance reviews, so they'll do anything to help you. If you can't do that, because they're sociopathic assholes, walk out the door. Really walk out the door, and don't look back.
Just keeping yourself alive makes you a worthwhile human being. You're contributing to to greater good if you do only that.
Your job is not who you are and it never should be.
If your job makes you feel bad, walk out and block all of work's phone numbers. Delete Slack from your phone. Just get a new phone if you can.
If your parents make you feel bad, block them too. You don't need know-nothings judging you. In fact, from what you've said, block them anyway. They've failed. You haven't.
Everyone else is faking it too. You've probably heard that before, but it really is true. Take it in, mull it over, and stop judging yourself.