Even as a 13-year-old, I could see gaping holes in the plot and inconsistencies. The aliens were hardly alien.
Even more so, I could see that the writing was clumsy and the dialogue was stilted. I could see how the writer was developing the story, and so I was not pulled into it at all. I was actually thinking to myself that I could write something like this. And I was 13!
I haven’t seen the movie, but from the sounds of it many of the problems with the book are also on screen.
Back when the X-Files was ruling the airwaves, in the 90s, there was a companion show called Millennium. The first season was a bit weak, focusing on serial killers and gore. Second season went completely off the rails in the best way possible. The third season was a lackluster attempt to regain a wider audience.
I would recommend watching the second season for sure. It has religious satire (you will know exactly who they are skewering when you see it), the occult, end of days, mixed in with humor and solid human drama. The season finale, when they thought that they weren’t going to be renewed, is extraordinary.