There shouldn't be a stigma toward cs2-esque mods, mods in the csbd/cs2 category are good starting points for modders to really hone their skills, it just so happens that game-design ain't easy.
It's basically just taking Cave Story and making minor edits to it
As an example, something like Cavern Tale (Which is one of the few good CSBDs that exists)
then I'm working on some sort of CSBD, which I'm planning on having a storyline similar to Cave Story but there would be so many differences it would barely be the same game
Yeah, CSBD just means "Cave Story, but different", it's a thing that isn't bad, but a few, select people are sick of seeing them from new users, despite that they can't be helped