Yes, freshman Castle would have had major issues with a Senior Yaxel, who has a significant size advantage on him and scores at all levels, passes well. You make it sound like Castle is a God. I'm not even sure there was a player like Yaxel in the entire field that year. Do you not realize how unique a player he is - he's basically an older Cooper Flagg. Sure Steph would slow him down, but he's not fully stopping the guy. You can blow your wad all you want on Steph, he's a great player, but Lord you are really making him to be something godlike. He blanketed Buie because the guy was tiny and on a limited team. He stuffed Shannon because the guy can't shoot. Not sure if Lundenberg has a weakness offensively at 6'9" other than maybe denying him the ball, and he has very good players surrounding him.
Are you going to argue to death that Steph is a better player than 25 Cooper Flagg too? Because by every metric, 26 Yaxel is a more highly rated player based on all around output.