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.
So, um, why didn't Tim just drive away quickly when Darla after being rejected by him, again, at the luncheon comes after him with murder in her eyes or while she is smashing his car?
For that matter, why did he ever let her contact him in the first place? If you're being stalked by someone, blocking them from IM is the most obvious step.
Also why did he play along when she showed up at the restraunt? Why not just say "my girlfriend isn't here, she's not my girlfriend"?
Why would Thurman have won the award for biggest loser for believing he had mind control, when Barry actually did what Thurman told him under the belief he was under mind control? Since Barry believed in it to the point that he did what Thurman said then he should have still gotten the biggest loser title.
Ho Yay: Tim and Barry definitely have their moments.
Retroactive Recognition: Future Oscar winner Octavia Spencer as the animal psychic ("She's talking to the lobster!").
Spiritual Licensee: Despite this film being an American remake of The Dinner Game, it's much closer to a modern take on the 50's buddy comedies of Dean Martin and Jerry Lewis with Steve Carell being the Lewis to Paul Rudd's Martin, especially how Carell's Barry greatly resembles a Lewis character down to the toothy grin and glasses that is a reminiscent of main character of the '63 comedy The Nutty Professor, while the Tim and Julia romantic subplot occurring along with the main slapstick situation channels the status quo of the old comedies, which features Martin's character's romantic subplot underneath the slapstick scenarios of those films.
The Woobie: Tim attends the dinner because he wants to impress Julie, and that decision allowed a stalker to harass him and damage his house and car, and almost cost his relationship with Julie. Barry has been treated like there's nothing wrong with his personality, while Tim and Barry's wife didn't tell him what people honestly thought about him and had to learn the hard way.