IIN that my mother keeps on criticizing me , i being a female in my late twenties , (i still live with my parents ), she'll be like "I told you to clean your room " or "You should read so that your brain wont rot and you'll stop talking like a 6 year old " or " Comb your hair "or " Go walk !" (All in an annoying angry tone )

Their house, their rules.
You answered your own question. Their house, their rules.
They shouldn't HAVE to be telling an adult woman to clean her room, talk like an adult, or comb her hair
Maybe it's time you moved out.
That being said, even a five year old can clean their own room after they notice it's getting out of hand or comb their own hair when they think it's messy. You shouldn't be letting anything get to the point where someone else needs to step in and tell you that you're hair needs combing. You're an adult. That's just unreasonable.