Help with grammar distinction?

When does grammar get better? Seriously i feel like i get worse with it every day i read.

I cant tell where a vocab word ends and grammar starts. I just read "そんなことより" in a manga im reading which i know is supposed to be really simple but it blew my mind. I super struggle with words that are mostly kana

My main struggle is seeing where a vocab word stops and grammar kicks in. Im a pretty new beginner so im really struggling to be able to tell what parts are a vocab word and what parts are grammar points i need to learn.

by maybe_we_fight