Epyonnn
I understand your pain, but I was in that review thread too, and after growing my reviews from 4 reader reviews to 10 reviews, I stopped doing review swaps so I could get honest reviews from my readers.
But here's something I did. I only reviewed books I saw had a great storyline and good English. The bad books, I didn't spare a glance.
I'd check your book out first before even agreeing to a swap.
I also went into the chapters, and actually read them sufficiently. I even left paragraph coments and constructive criticism, before I gave my review.
As a result, all my reviews were genuine and contained specific details about each book I reviewed. Seeing my methods, most of the authors I reviewed did same, and when they saw my book was good, some actually collectioned it.
Point: Review swaps are not all bad when done properly.
Again, you should note that it's better to give positive reviews in review swaps than to overly critique genuinely good books because your review makes up part of the first few ratings that collectively make up your general rating.
And your general rating determines whether a reader even gives the book a chance or not.
It's important to give a good book a chance to be seen by readers. Especially as there are several poor books here on Webnovel.
My tips: Critique typos and little errors in the paragraph comments. Give a good review to a good book. Ignore bad books. They shouldn't even be on here.