He says this because Darry (his older brother) has everything going for him except for his family situation.
If the Curtis boys' parents had not been killed in the car crash, Darry would probably have been able to go to college. He was smart and he was athletic (would have had a scholarship to college). Beside that, he also had short hair.
But instead, Darry has to be a roofer so he can support his brothers. So if it hadn't been for them, Darry would have had a much easier life -- much more like one of the Socs.
Darry is a guy that has everything going for him. He is smart, athletic, and incredibly good-looking.
Darry was too smart to be a greaser.
If any of the greasers has a chance at improving his lot in life and making something of himself, it is Darry. With his smarts and athleticism, college and a solid career are very real possibilities for him. Unfortunately, he has been dealt a tough family situation. Both of his parents were killed in a car crash, and Darry wasn't about to let his brothers and him be broken up and put into different foster homes.
"If the judge decides Darry isn't a good guardian or something, I'm liable to get stuck in a home somewhere. That's the rotten part of this deal. Darry is a good guardian; he makes me study and knows where I am and who I'm with all the time."
Ponyboy's comment tells readers that Ponyboy is very aware of the fact that Darry gave up a promising future in order to keep the remainder of his family together. Ponyboy believes that Socs are all but guaranteed a promising future because they are Socs. Ponyboy definitely understands that Darry gave up his chance at the good life. Ponyboy is humbled by that fact, and he also feels a little bit guilty. Ponyboy feels that he and Soda are holding Darry back.
In the book "The Outsiders" Darry is the oldest of the three boys, Darry, Soda Pop, and Pony Boy. Darry is muscular with good looks. Darry was a football player who hung out with some of the social group in the school. He was smart and could have done more with himself, possibly even gone off to college on a football scholarship. The boy’s parents get killed in a car accident. Darry has to quit school and get a job in order to keep the boys together. When Pony Boy makes his statement he is explaining that Darry's life had changed because he had to take care of his brother's.