My son is such a miserable fuck. I bought him a new trampoline for his birthday, and all he wants to do is sit in his wheelchair and cry.
I'm really concerned what I'm hearing about your son. Should this be considered a good personal attitude to take towards disabled people?
I feel that my son is a failure and I hate him. He should've been fine to play with his trampoline, but no, he failed again.
While I can understand being frustrated that your gift was not well received, it isn't right to consider your son a failure because of his disability. People with disabilities are not responsible for their conditions and therefore we should not judge them negatively for things outside their control. It would be good for you to be involved with your son and be supportive of him and his disability so that he can go on and live a happy life and make you a proud father.