what do yall think about haebom?

Haebom from CBAW. i think hes a bit childish. i cant pinpoint why i feel this way, i just do.
Perhaps its cus he literally looks the same since when he was 14 years old.
maybe its cus the fandom babies him alot. i think his character could be fleshed out more.

this is a genuine question, not an attack. i want your honest unbiased opinion on how mature he is, keeping in mind that he is 24 years old now.