I've been using a service called Hardcover after switching over from StoryGraph last year. I've been searching for a 'letterboxd for books' for years and I think this is the closest I've found so far.
Hardcover is my favorite as well (though I’m still tracking in StoryGraph and Goodreads mainly because Goodreads does it automatically from Calibre). My only issue with Hardcover is that it’s got the worst book database so far but that’s a relatively easier fix with services like openlibrary. My link is in my profile for both.
Why did you leave storygraph? I just got on it because I wanted an online log of some sort. I dont mind it so far. Although I literally just joined 3 weeks ago