And when you consider all the necessary things that this film was lacking (interesting action, a compelling plot, any degree of romantic tension, etc.)

I agree! I also agree with your judgement except I think the story is afterall a good idea. After watching the movie people may ask the question “committing suicide means closing the door to Heaven no matter what?”. The movie was hyped literally and that’s why I wanted to see it at that time. I was disappointed and never saw it again.