"Becky" is a ridiculous and unsatisfying would-be-thriller, which is never thrilling, never believable, and even fails to shock. This is down to the fact that the graphic violence it resorts to is more likely to bring laughter than unease, as is the ridiculous character arc taken by the titular Becky, which completely leaves any semblance of believability behind.
For most of the movie I was reminded of one of those forgotten thrillers that were everywhere back in the '90s. How hard is it to make a good thriller? It must be nigh on impossible, given how many there are, and how few manage to thrill. The set-up is pretty typical: a family reeling from the death of their matriarch is beset by escaped convicts looking for a missing key that for some reason is located in the family home.
You know that this is a modern movie, however, for two reasons: the ridiculous, over-the-top violence, and the fact that the movie goes on a similarly ridiculous "girl power" tangent, where we see a thirteen-year-old facing off against four or five hardened criminals.
About that violence: in one scene, a man gets stabbed in the eye, and goes back into the house with his eyeball dangling out on its nerve. He asks another guy to cut the nerve (as you do) and that guy fails to do it, apparently not cutting hard enough with a butcher knife, so the guy cuts his own eyeball off instead.
I did not see this movie in the theatre, but if I had, I bet that scene would have been a laugh riot. It's like something out of a horror comedy, and yet the movie is not comedic at all.
Despite, of course, the presence of Paul Blart himself, Kevin James. Comedians have played villainous roles before to great effect, ie. Robin Williams in "Insomnia" and "One Hour Photo" and Jerry Lewis in "King of Comedy". With this movie Kevin James shows us he does not have it in him. He is not intimidating at all in this role.
The ridiculousness of the movie's violence converges neatly with its girl-power angle. Any movie about somebody surviving and turning the tables on a group of bad guys features that person unleashing their inner MacGyver, ie. fashioning traps and tools in a matter of moments. But who expected the girl to be such an enthusiastic participant in the carnage?
It's not like the movie shies away from that realisation, but that doesn't make it any less stupid.