I used to write reviews for works in Novelupdates, but that is because:
1. It is probably in CN
2. It is finished.
I don't like to review works that aren't finished. Sure, I will post comments on individual chapters because they are by right, finished. But to review an uncompleted series feels like a tight slap in waiting.
If the start is good and goes to shit later on, I will probably have to step up for a PS.
If the start is bad, I would have long dropped the work and have a slight chance of picking it back up, praying that it gets better as I furiously zooms pass the front.
Rarely has a work remains good from front to end. Especially CN where the authors seem to understand they need to kill their cashcow and don't even bother dragging it behind the shed. Instead the slow strangulation is upfront and personal.
If it is bad, I will not even bother to talk about it.