I'll give a reply as the author myself and how I view it to help you understand
WSA is based on commerciality, What do they mean by this? Well they mean how well they think it will sell basically.
When My vampire system entered WSA, it not only went on to the top of the power ranking but was also the best seller for the whole of that time.
It even outsold the Crown's obsession, the female lead winner, that you spoke of.
Now it's also based on potential, so how well do web novel think it will sell beyond the competition. And even to this day, 6 months, or however long since 2020 WSA has ended, it is still the top seller in the male Category, and daily sales have doubles since then.
My advice usually is for up and coming authors is rather than look at its faults and think: How come this story is number one? I can write better than this, my story is better!
You should focus on why did it do well, and that way you can use the same things in your own story. why does the story sell well and continue to do so. IF a story sells, and is one of the best selling despite everything on the platform then you need to try and see why.
For me, there is no right way or wrong way to tell a story. I write what I enjoy, and it seems like most people on this platform reading feel the same way. You shouldn't;t limit your mindset, also you echo chambered the reviews. Even if you got rid of the spam reviews, most of the reviews are positive, and you are only looking at the negative.
hope this helps