These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Bile Fascination: Much of the audiences were drawn in by (negative) word of mouth of how entire theatres bursting into laughter at the sight of "Produced by M Night Shyamalan" during screenings of its trailer.
Broken Base: Some felt that this movie was, while not as good as early Shyamalan, at least a return to form. Others felt it was a continuation of his self-indulgent streak.
Complete Monster: The Devil. Yeah, pretty obvious, but specifically not only does he do the above but he drives a random person to kill themselves, kills anyone who tries to stop him and for the last one he forces a loved one to watch the person get killed, all the while mocking his victims.
Lawful Evil: Because of Tony's guilt and regret, the Devil cannot claim his soul.
The Old Lady/The Devil: Damn... I really wanted you.
Most of the people in the elevator, but one can write that off as stress.
Special credit goes to the security guards, who take way too long to call the police or the fire department to get the people trapped out, when in real life, calling both would be the first thing you would do after determining that the elevator couldn't simply be turned back on. They also mention that the elevator company had gone out of business. This naturally does happen in real life, and when it does, a company would be scrambling to get in contact with a new company, because not having an elevator company insuring you is a wonderful way to be sued out of existence.
The guard who believes in the devil at one point drops to his knees, closes his eyes, and begins reciting a Hail Mary in front of the security monitors. Not only is he actively ignoring high strung claustrophobic murder suspects trapped in an elevator with each other, he recites the Hail Mary over the radio so that said trapped claustrophobic murder suspects can hear him. He is doing in Spanish, which thankfully none of them understand, but it still freaks them out. In fairness, though, he was convinced one of the people in the elevator was the devil. Looking at the screen wouldn't stop the devil from killing people, and in fact didn't stop the devil from killing people. He did basically the only thing he personally could do at that moment: pray to God for forgiveness and mercy.
Oh look, a high voltage wire is broken. Why don't I step in the water so I can reach a little further with a stick? Extra points because he had made a conscious effort to avoid the water, then changed his mind because he needed to reach a little further. It gets really bad when you notice there's a 4 inch tall wooden crate bed leaning against the wall which he could have easily laid over the puddle to avoid touching the water.