The trailer led me to believe it was laughed-out-loud funny in every scene. It wasn't so. It was more amusing than hilarious. Too much character background intro; it could've cut out about half an hour. However, 90 minutes was good enough brain-less entertainment on a Sunday night.
Don't think too hard on which characters deserved to die and which did not. It would take away the fun. Just enjoy the bear basking in the cocaine powder shower. That was a glorious sight.