Is it normal that i feel noone will respect me because my mom doesn't do it?

My mom always has treated me like I was dumb. She talks to me as if I wasn't worthy of respect, at all; she's aggresive with her words, she doesn't use the words 'please' or 'thank you' with me. She yells to me a lot, she doesn't understand if there are more people, she still talks to me as if I were a stupid; she says very innapropiate things, she contradicts a lot what I say using a very sarcastic tone of voice, letting know everyone what I'm saying is just nonsense. When she doesn't like something I say, she tells me to get out of the place. Now she doesn't yell, some years ago, she used to say: get the hell out of here and lock yourself in your room! Now she just say my name in a very serious tone and then 'get out'.

When she does that kind of things, the people who is there starts laughing, I feel so disrespected. At this point, I just try not to say anything, everytime she tells me to get out, I just do it, I'm too sensitive and I don't want to stay there becuase I feel I am being annoying and humiliated at the same time.

Everytime I've tried to talk to her she treats me as if I were being a hypocrite, like I also am like that, I also yell, I'm also very grumpy, angry, so I don't have the right to demand respect and I have to accept the way she treats me. When I try to tell her that I felt bad because of something, she never thinks I may be right, she just says: "and when you talked to me like that? You already forgot it!?". I know, I'm not an angel, and I was not the quiest person in the past and I am not now, but I am trying to have a good/respectful relatiipnship with her, but it's too tiring, it's a 24/7 challenge.

It makes me very insecure, I've been with friends at home, and she acts that way, she contradicts me, she makes fun of what I say, and when I ask her to be nicer, she starts yelling at me and complaining about how I was in the past and how I am now. I try to be respectful with her, and especially when there is more people in the house because I want to give a good impression, that's all, but she just doesn't get it. I hate that she contradicts me in that sarcastic way and I hate she never thinks she could get better.

I'm not trying to say I'm the victim, I know I'm not an angel, like I said, but I've tried, I've been more flexible, I've been more respectful, but it doesn't work, and it's tiring. And what it worries me the most is, my mom has made fun of me everytime she has could, and I don't want everyone to do that. I remember times when I've said something, she starts laughing and saying unnecesary things and making me look stupid, like is that difficult not to be so inappropriate?

And I'm not trying to pretend I'm someone I am not, I just want her to respect me, I don't feel like I can be with my friends or bosses with my mom because I know will say something like that totally on purpose, (sometimes is on purpose, sometimes she incredible doesn't realizing what she's doing or she thinks it's not wrong, even if she knows I wouldn't talk about any specific think, she just don't care).

I don't want everyone do the same, and I want people respect me, but it's hard if there's something contradicting everything and not respecting your way of doing things. I'm not a child, I'm 25 now and I may be very inmature, but I don't know what else to do.