My brother is an asshole and mom spoiled him, what should I do?

Hi everyone, so I come from a patriarchal family, I have a brother, mom always spoiled him as a kid, as in she would say "boys don't do house chores they should be out playing and girls at home helping parents", etc. I was a bitter kid once because of this, I worked hard to stay away from my family and build my own life.

Now I'm 27, he's 29. I'm finally doing better than him since I make like 5-6times more than him. However, my brother is really an asshole, he thinks he's superior and I should respect him cause he's a man.

Every year he makes debt like $3-5k, nobody knows what for but at the end mom has always been the one paying it. 2 years ago we fought bc money related problem, he said he would beat me to death and I told him he's just a dumb low life people. We didn't speak anymore even when my dad died I texted him, he ignored me.

We started talking again, not much but okay, now I'm taking my mom for holiday for 2 weeks, staying at 5 stars hotel etc cause truly I just want to make her happy. But he's not happy about it cs he thinks my mom is closer to me bc I have more money, and I flash my money on her to get her. He blocked us on whatsapp while I didn't even say anything to him. Didn't pick up calls from my mom, etc. I'm really upset by this and told my mom he really is an asshole and I'll just consider I don't have a brother.

Instead my mom asked me not to take this personal and to hold my feeling. She said it's easier to talk to me than to him so she'll ask me to understand and apologize to him, even if I'm not the wrong one just so we get along. I told her, I did it once but not anymore this time. And instead she blames me and said if I'm being like this than I hurt her feeling.

I feel like even after all my effort to be the nice one is worthless just because I'm a girl. I don't know what should I do? I'll be happy to stay away from my family but I know I owe my mom everything in life so I couldn't leave her. But she just keeps hurting me.
My brother is an asshole and mom spoiled him, what should I do?
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