How can I stop my mom from doing this immature crap?

But I* not buying, for some reason I can’t edit the question.

take whatever money you have and get a lock for your room. I feel so bad for you, my son lives with me, leaves stuff on, gets food on the furniture etc, but I’m so glad he’s here. Try to find out why she’s angry- by asking her about it when she’s calm.

Do you spend a lot of time on your computers? Is that why she focuses her anger on them?

Honestly, her behavior sounds a little out of control.

You may want to unplug all your cords before you leave.

Lock your room.

@JLeslie No I don’t use it all the time. I will probably get a lock for my door.

You can’t change someone else. :-(

Explain the lock and the necessity. I’d tell her gently that you’re planning to save money so you can move. When you are working, you might offer to contribute to the household budget. She may be having hormonal problems.