I watched it last night and oof.
Oof, oof, oof.
I haven't read the books, so I can't comment on how bad the changes were. This movie looks and feels like it belongs in the mid-2000's when every studio was trying to find the next Harry Potter. The second act was a complete drag (which shouldn't happen in a 90 minute movie) and I don't know what the hell Dench and Gad were smoking to make the accents they put on. I wouldn't call it the worst film of the year, or even one that deserves the 10% it has on RT, but...yeah, you're better off just skipping this.