Is it sinful to make a dua to ask Allah to reject another person's dua?

Not long ago, I would make a dua or wish to Allah to not only curse but to not grant the duas of the intended victim in the afterlife. I asked this question before but O was adviced to make it more clear. It is not just me but I am sure many does it. The thing is, does Allah listen to the dua of the men more than women's dua. And does Allah grant the more better Muslim dua over the average Muslim? Long ago, this boy who used to bully me said that he is making a dua in which it will make Allah not to grant any of my wishes in the afterlife. He also said that since he is a boy, I cannot undo this curse of his. Will Allah apprive of the boy's dua because his gender is higher? Also, I am not sure if this is the whsipering of tbe devil but... do pious people control our duas. I have been envious of the Prophet SAW because of the thought that he would ask Allah not to grant a dua he may not like. Since Allah is close to Muhammad SAW, I think he might do it for him. Is this the devil's whispering? I am sad because I am mentally veing trialed. I need help. The thing is, does ANYONE has the right to have a say in if Allah rewards someone even the Prophet SAW himself? I cursed that boy mainly due to anger, hate, and greed. Did the Prophet SAW did not hate his enemies that cursed and bullied him like the boy in my life? I know I should have a good opinion of Allah but I cannot sleep well and I have been crying. I was told by many Muslim men that because I am a woman, their duas will rule and control over me.