Disappointed with my mother

I need some advice..

Ok so sorry it's long please I need some advice , I'm the only child my mom never had more kids after she got divorced from mg dad is just me, i have 2 boys, a 4yr old and a 3 yr old and one newborn girl she is month now.

My mom can't not come to the USA bc she did something illegal when she was young so I always go to Mexico to visit her and take her grandkids, she has such a good heart, but she doesn't have patience at all with my boys she wants to be the mom sometimes and my boys dont like her grandma my mom, they prefer my mother in law.. and that's bc she gets them scared sometimes bc she gets mad and that is wrong so I had a problem with her bc of her being so hard on them, and I though that was over but no.

So my baby girl was born just a month ago and I took her alittle earlier with the hospital papers, I dont have birth certificate yet, so I risk it even though they let u go back go the USA, so I though it was fine with my boys I waited until I got the birth certificate, so anyways I wanted my mom to meet her sooner , and I surprise her , she apparently had plans to meet with their friends from high school , a reunion, so I though she will probably cancel.. but no she never did , she told me she wanted to go for just an hr , and i told her I'm not gonna come in a while , this time I did just so you could meet your granddaughter and she didnt care she still left , I got there at 5:30pm and she left at 8pm and was so desperate to leave and left so me and my husband we waited for her she took 2 hrs or more and she even eat over there at restaurant bar with her high school reunion ...

My aunts and family saw me crying when she left and told me that my mom was so immature and that I should just let it go, it really hurts me that she left by the time she got back I have to leave already it was 11pm . So I left at 11:30 bc they were gonna closed the Express line to cross the bridge .

One of the things is that my mom is a bisexual she had a girlfriend before she is not with her anymore ,she become bisexual 8 years ago and my family or aunts dont know about it, and before she left to the reunion my mother told me I want to come out of the closet , she said her therapist told her to do it, bc she is living scare and she needs to get it out...

So I though ok I mean she is an adult , I dont mind her personal life, I didnt know my mom was gay just a few months ago she decide to tell me her story so I been ok about it , honestly, as long as she is a good grandma I dont mind but everytime is getting worse she acts so immature..

After that day I took her granddaughter I left , I told her on messages why she would leave? I got so sad and disappointed, and she just got an excuse for everything, she said she needed to tell her friends she could not stay long and be ok with them, I told her just make a call , your family comes first I mean be ok with me not with people, but my mom likes to pleased everyone, she worries so much for other people that are not blood , she said I should of tell her before that I was going to visit her that I shouldn't surprise her ...

I told her but I bring ur granddaughter like she is a newborn. I though u would be excited , I told her ask ur therapist about this and I think you are wrong , my mom told me I been thinking of dying I dont want to live anymore and I told her Dont be immature ... I tell her that bc my Dad died in 2012 he commit suicide and she knows better than that ,she always been positive with her life after my dad left, she told me she wants to be here for me and my kids when I was pregnant everytime , we always though we wish my dad was here so he could see his grandkids,

My mom is been studying in college in Mexico to be an odontologist, she is almost done with her career... she is so smart at school. But so dumb at her family I just feel so left out. She hasn't talk to me since 2 days ago , she doesn't think she is wrong , and that's how she is , she wants me to beg her but I wont do it... ,

My husband knows about my mom and he feels left out to that she left to the reunion, about her be bisexual or lesbian , we respect that as long as she is a good grandma ... but I'm just so so confused I wish I had perfect parents , I tell my husband I want to be a good example for my kids and be a good mother 😥 and grandma one day to and support them and be dont cause a divorce ever I want my kids to have their parents together so they know we are a family ... my husband agrees with me 100% we love our family and he supports me so much I'm so blessed , but it's just makes me sad that my mother doesn't get it