Can't understand the statement

Hello everyony.

Would you please help me understand the underlined part in the following statement which I came across reading an article about a movie, on Wikipedia?

Here's:

The film holds a 52% approval rating on the review aggregator website, Rotten Tomatoes, with an average rating of 5.7/10 based on an aggregation of 134 reviews, and received the critical consensus: "It's enthusiastically acted and reasonably fun, but Jack the Giant Slayer is also overwhelmed by its digital effects and a story so middle-of-the-road as to be a bit bland and impersonal."

I would normally expect something positive to come after as there, for example: ..as to grab attention and keep viewers interested.

The only logical, though unlikely, explanation I can make of that statement, is that the movie's being overwhelmed by its digital effects and a story so middle-of-the-road, was too much of a downside for it that it's not even as good as is in being a bit bland and impersonal - that is, that movie is worse than being called a bit bland and impersonal.

What do you think? Thank you.