Why does my mom obligatorily feels the need to have power over everything? Is there anyone who knows how psychology works here?

I'll make it easier for both of us, I want to know why do people feel the need to have power over a situation

Not only my life decisions, I can't even breathe without her controlling me

Thank you for the small information that you gave me, have a nice life

Psychology

I can't respect the person who doesn't value my mother. I can't be good to someone who has no respect for my family things, my family values. We all have struggles. We all go through them. Isn't it selfish to judge ppl based upon thier struggles? Like uncle g, here i am, see me for what i am. You don't need to make jokes all round referring my mother's coaching center as a government school. You are already too grown up. 

Family

I feel like shit. It seems like no matter what I do I will always be the disappointment in the family. I try and try again to get the okay from my mom but it seems like she is never satisfied with what I do. She says that she loves me but that's a load of crap, if you loved me you would be there for me through thick and thin. She treats me like garbage, I just wish she was someone that I could vent to without feeling judged. 

How can I prove to my mother that I’m emotionally mature?

My mom is really grumpy these days 
She picks up fight w me everyday and scolds me most of the time and keeps on nagging me

My mom is so toxic that sometimes I wonder how does she sleep at night doing what she does to people. How do such people justify themselves to their God? Such a manipulator. So bad to her own children and family yet the  nicest to others. 
People always say good things about her and I assume she speaks bad about us outside. 
She talks to my ex who abused me physically. And an event is coming up where he might be present. If she talks to that guy I swear I will cut all ties with her. 
I had a boyfriend who had proposed to me. We wanted to get married but she created such a big scene and I had to say no to him cause she said things like "If his parents come to our house I'll insult them and say horrible things to them." I'm 27 now and single. When people ask why I'm not married yet she brags that our daughter wants to marry someone of our choice. What a load of horse-shit! She walks like she is the perfect person on the earth after causing so much damage to our family. It's not like we all don't know how to shout back or abuse or say worse things to her. We chose not to. My dad always says "Only love can change her so be nice to her." 
All the trauma she has put me through I haven't received a single apology from her yet I behave normally with her pretending that nothing happened. But I despise her fake personality. 
She talks to boys (she wanted son who would drive her around, take her shopping). Let's out every secret of our family to these dumbfucks she talks to. I don't trust her. I don't know when I'll lose control and leave my house. She blames my father for the troubled relationship she has with her kids but in reality we grew up and understood how horrible of a human she is. Dad has nothing to do with it. 
I can't comprehend how a mother can be like this to her children. How can someone be so selfish... Hear this... She wanted me to marry a rich guy so she can lead a comfortable life... 
Idk man. Why is she like this... What do I do...
I can't imagine what my dad must have been through. What would you guys do?

So My mom is a bit toxic and i am frustrated with her behaviour towards me. I Dont know what problem she has with me but she constantly Keep on taunting me indirectly. And You can ignore this till a point. I dont want to discuss this with her coz she wont understand anything. She keeps on taunting me indirectly everytime whenever she talks with other people too she does this it makes me upset i dont know what to do.

Parenting

I'm afraid that I become like my mom while growing up

Life

I’m feeling mad and really upset because I feel like my mom hates me and mistreats me sometimes and I’m scared of her but idk what to do abt it

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