I kinda just stumbled upon this subreddit/your post so I don't really have the best advice to give you, but I'll give it a shot.

First off, Your mom sounds like she is mentally ill or lacks basic social skills. Like this is straight up something the Asperger's kid from Parenthood would do when he was having another one of his "episodes."

Secondly, don't kill yourself, like ever, but especially don't do it cause you didn't want to eat your moms pudding and she got mad. Because not only is the world an amazing and large place filled with interesting people/thing that you can explore, but also cause that is how people will you, as the girl who died over pudding. And you deserve better than that.

Also, I am assuming in your future you don't plan on your mother being in it, so think about that. One day she won't be a problem, just think about that. It is how I mentally dealt with bullies as a kid, I thought about how one day they won't be a part of my life because even though they don't even realize it, that was the true power I had over them.

Now I live thousands of miles away form them and the only time I ever thought about them again was to help some stranger on the internet. So imagine a world where she is only a thought and then work towards making that world happen.

"You not changing the world, your just changing your world."

Finally, my advice is to find a job, any job. start going to that job and making money. Then when you have enough, move out.

Become your own responsibility.

I don't know if that made any sense, so hopefully it does.