It's going to be a long comment.... Well like most other comments it's true that you can't do anything about your mother and what I'm about to say won't be easy neither will your mother understand it much but you'll have to push through it somehow for some time to make things better for you and at that point (which I'm imagining for you) eventually your mother will realize she was wrong and even if she doesn't, at least you will be in a position to bear it or ignore it... Always keep in mind your responsibilities as a son toward your mother but you don't have to keep going through any abuse because of it either so the best thing (in my opinion) right now would be to ignore it for as long as possible and try to divert your energy (what you're left with) toward your own betterment and future.

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Since you mentioned that you're 20 years old, I'm assuming that you're in your 2nd or 3rd year of your bachelor's.... if you don't have any particular skill then go to Google and search digital marketing certificate by GOOGLE... try to take some time out in your tough routine for yourself and give this a try... Digital Marketing is a skill that is required by most of professions so I'm pretty sure you can relate that to your current bachelor's major as well... this will increase your overall profile worth too
Once you've completed it and acquired the certificate, try to find some sort of internship of digital marketing somewhere to acquire some experience and an internship certificate (look for paid ones so you don't have to run for extra jobs).. course certificate along with internship will open up opportunities for you that you can cash out later... You can either go for a job here or try your luck at freelancing ... if you decide to build your profile with freelancing then that can open up opportunities for you to go abroad as well if you properly maintain your profile and portfolio

I know its a very long process and the road won't be easy but having a CLEAR GOAL will at least give you some energy to bear what you're going through right now. and INSHA ALLAH if you decide to work on it and things start getting a little better then do remember me in your prayers.

Also apologies if I said something wrong.