Well, I don't think anyone wants or expects some Shakespearian writing from this series.
But when said series is extra-convoluted, has terrible pacing, multiplies retcons, pull things out of thin air without explanation, introduces Deus Ex Machina, treats its characters pretty badly and/or introduces "-Sue" like characters, you know you have a problem. There are countless stories with better writing than KH. Some fanfictions are better written than KH.
I'm all for fun and not overthinking things, but this series need to improve its writing drastically.