That was my feeling. It raises very good questions (to me, not answering is a plus), but the plot, despite starting well, went downhill by the last third of the movie, with the ending seeming more like "well, we ran out of money, lets wrap this up" than a real ending where all the pieces in the table are given a conclusion (Boyega's character is clearly the best example regarding this,I mean, he is the first to understand the dangers not only of that kind of technology but also of the Circle itself, and he ends up getting used by Emma's character to bring down the Circle, while being betrayed by her in the sense that she replaced the Circle and continued the crazy path technology was on. The end of the book was better).
And Emma's character was pretty unlikable. I mean, when a character goes that deep into what is basically a cult, we are expecting some kind of revelation, one moment when reality comes down on her, but no, her parents cut ties with her, she basically kills her only true friend,, and hits the bottom, without flinching, only deciding "well, this is the way, but we need to get rid of the Circle and make it even more crazy transparent and universal).
And Tom Hanks is completely underused. I mean, why did they hired him for such a blank character?
So yeah, pretty great questions, weak movie.