No matter how bad your review is, it will still be listed on your reviewer page on Amazon (yes, they exist; just click on a reviewer's name). This is a small spreading of news/linking back, and it will be helpful—almost no matter what you say. Almost.
Because this is not a negative review, you can add some length to it. But because it's not unremittingly positive, it does not have to be lengthy. The ideal length is probably about 50 to 100 words. If you want to say more, contact the writer in private. For self-published works, editing and republishing are usually pretty easy. Hence if you find a glaring translation error, the writer can fix it. You can save the day with your review.
Yet another thing to think about concerns the making of films. When films open, they are huge collaborative efforts which include not only the writers, actors, makeup and set people, special effects, the director, and the producer. They are also a product of budgets, and of timing. When a tragedy occurs, a film might be delayed, or even shelved indefinitely. And the same thing can happen if the star dies or becomes embroiled in a scandal. Furthermore, some films would benefit from an update in special effects technology. And others would change with our current social sensibilities regarding feminism, LGBTQ rights, and other issues.
What happens at the top of the ticket? And that doesn't have to just be in America. What about in other countries? How are leaders chosen—and who do they end up beholden to when elected? Top candidacies get a lot of press, and national leaders have nearly no time to themselves. Even bad leaders can be inundated with work. These are undoubtedly extremely stressful jobs, no matter the size of the country or the type of government.