Why do Japanese novel kind of suck (RANT)

Hi so I'm really into reading manga, I love them but when you read their original material such as novel, I'm always left with :

"God this is trash, this story is only good with its manga adaptation"

Yes there could be problem with translation but very Japanese novel that I've read has these:

- First POV
-Cliche tropes

I don't know how to explain it, as if they were written by a gradeschooler, it has the most mind numbing plot I've read, why are they like these?

Even the erotic scenes are funny.