I found the UI of story graph unusable, like among the worst I had ever seen. I remember having to google how to see books I've already read. Using hardcover.app now, whose only issue is that the performance is really bad

Storygraph is brilliant, but it really needs some UX love for things like viewing your book piles (read, to-read, dnf) etc.

It's also quite slow, but I suspect that's just part of it being a smaller site.

Indeed what I've been using, since I learned that Goodreads was owned by Amazon