The basic premise of the '80s TV series "The Equalizer" was just generic enough to survive on CBS in that decade of bland, and in making the jump to the big-screen, it appears to have survived with all of that bland firmly intact.
While I personally didn't care for much of anything about the film, I don't think it's ineptly made or awful so much as just forgettable. It's a teflon film. It slid right off my brain pan just as soon as it made it in through the rods and cones, and even trying to summon up specific scenes or gags a few days later, I can already feel it slipping away. Part of the problem is just plain familiarity with the tropes of the film. Denzel Washington plays Denzel Washington, essentially. This isn't a character the same way Creasy in "Man On Fire" was a character. It's a very mild riff on the persona that he's firmly established over the last 20 years, and the one thing that distinguishes him is the way he sort of thinks his way through a fight visually before it happens.