On the contrary, the show fucked over the kid who played him.
He delayed college and actually bought a house near Atlanta where they shoot. In the season they killed him off. He had a limited role in the previous season as he was finishing school, and decided to firmly commit to the show. And they responded by killing him off. Honestly in one of the most unsatisfying way possible. His character died to save a new character, and then the show killed THAT character off a season and half later, in a dumb way.
I didn't know about his schooling. All I remember is his father making a fuss about it and then hearing that he didn't love it. Like I said, I hated the character. The only interesting thing was when he had to kill his mother, which was 1 of the craziest things I watched back then.
Siddiq dying was weird more so because of his kid and not Carl for me. They are taking too long to establish Carol, Negan, Maggie and Daryl as the pillars of the show. After Rick died, I had to quit the weekly watch and just wait for the season to end and binge.
When you know certain actors have to leave and watch how the writers poorly remove them, it's so out of focus. They try to prop up other characters into their dynamic and fill in as mentors, love interest, protectors, etc. It's so forced.