I heard that despite being a movie about a civil war on US soil it's somehow devoid of any kind of substantive political commentary (beyond "war sucks" if you want to be generous I guess) and immediately knew it wasn't worth my time. If you're going to tackle a subject as serious and fraught you'd better have something meaningful to say about it.
That's just not what the movie is about. There are other ideas beyond current political situation to explore within the setting of a US civil war, and the movie does that well, in my opinion. Plenty of media out there exploring those alternate themes, many more than pieces similar to
Civil War.