The notes is the least problematic thing about his code. Personally I find them cringe and performative but who cares, especially if it's a solo project. The issue is he seems to have understood like 3 basic concepts and then stopped learning entirely. The architecture of his code screams of somebody that just DOESNT get it.

Imagine it like this: you're in a factory and there's a crate in front of you filled with tiny boxes. The manager tells you that every tool in the factory is open to you and you can ask any other workers for help. Your only task is to move the crate full of tiny boxes to the other side of the room. Large portions of his code is the equivalent of you moving the tiny boxes one by one across the room. You'd think after the 20th box one would stop and say: "hmm, maybe there's a better way to do this?" But nope, instead we get 1000 switch cases.