Why mothers had to be mean with their own daughters?

....some, im not saying in general.

They constantly hurt their daughter’s feelings and making her feel so little and useless.

She just said “He dont even wants to marry you!” I said “yes, he does!”

she proceed to said “well, it doesnt seem like he really wants too! And if he does when? Lol” i really convinced myself that she dont like me much 😥 i have two brothers (28 & 36) and i know how she is with them...she cares more about them than me. She made fun of me by laughing in my face and basically making me feel like nobody really wants to be with me 😥

I do a lot for her and my brothers...

But i know that one day when i move out, she is going to regret and feel bad and lost without me 😰 i hope not but, every day she push me away a little bit with her bitter heart.