I am interested in what medium you read this. So let me frame this discussion. I have 3 formats I "read" in:
* Actual book
* Kindle
* Audible
I find that not all books work for all of these. I have not figured out what works best for what medium, but I will give you 3 examples:
Kindle - I bought Children of Time on Kindle and could not get past 22% (I just checked). I don't know what it was but I found it impossible to get into. Someone else who likes the same stuff as me loved this book. I also know that you and I like the same stuff (see next point). I have read the Bobiverse series as well as Murderbot on Kindle and loved them all. So I guess not especially deep books work better in that medium for me?
Actual book - I have about 50 pages left of Death's End, the 3rd book of that Three-Body Problem trilogy. Holy shit this is good - Like 1 of the 3 or 4 best series I have ever read, up there with the Foundation stuff and Hyperion (Dan Simmons) as well as Tolkien.
Audible - This is my most fickle medium because if there are too many characters I have a hard time following. By nature I cannot just listen to a book. So I'm always doing something else. I found Goldfinch excellent on audio, as well Readme & Seveneves both solid by Stephenson. Yet the same author's Anathema was impossible on audio.
So how did you read Children of Time? I wanted to like this but I did 0.0 for me.
I'm always an actual book guy. I just like the "thing-ness" of a book, if that makes any sense. It's actually part of what I enjoy about reading - the feel of the book itself. (I even have a preference on the size of paperbacks - I prefer the larger size paperbacks because they're just a nicer thing to hold.) I had an early Nook but it just didn't click for me. It wasn't anything specific - it just didn't feel like a book. To be fair, I only read one or two books on it (I think one of them was Philbrick's The Last Stand, which I loved, so I don't think it was the book itself that was the problem.)
And maybe that's the case for you, too, in reverse - it may not have anything to do with the medium. Maybe it's just not your thing. I do think the way it's written may turn off some readers (the constant alternating chapter structure could be disruptive, especially if one of the two worlds has a more compelling story going on at the moment.) But it might just be as simple as the idea that the story didn't appeal to you - I've had that happen a bunch of times. (In a totally different genre, I really wanted to enjoy Nassim Taleb's Antifragile because I loved both Black Swan and Fooled by Randomness, but I couldn't get past the first couple of chapters. I know why that is - I hated how he seemed to be constantly beating you over the head with his central theory - but that was his style in all of his earlier books and for some reason, this time around I just couldn't stand it.)
I'd love to hear what you think of the entire Three Body Problem series when you're finished. That's unquestionably the most epic trilogy I've ever read. There are so many ideas flying around in that series that I could probably read it a half dozen times and still only capture half of them.
As a sidenote, I'm trying to mix it up following Children of Time. Right before I read that, I read American Elsewhere by Robert Jackson Barrett (a sci-fi/fantasy hybrid) so I wanted to take a step away from this genre for a moment. But I'm still a bit too real-world weary to read any non-fiction at the moment. So last night, I started Bernard Cornwell's The Last Kingdom. I don't think I'll read the entire series (I think there's something like 18 books total), but I'd like to read the first three. (I think there's a Netflix series based on it as well, so I'll probably check that out once I'm done.) But if you have any other sci-fi you'd recommend, I'd love to put it in the queue for after this series!