How would you rate reading this. I need to know if it's worth to read

Depends on what kind of BL you're into. The beginning is really bad (rape/non-con/verbal and physical abuse), but the end is nicer. I still rated it low, because the beginning was shit to me.

It's very sad but it gets really good in end and also happy ending. If you are interested and you want to not ready the grape and abuse part just skip till 40 or something chapters.