Why does Trump, or a Trump-like figure need to be in the movie? Did he go away? He's been the president. He's on every channel. You want a warning for a Trump presidency? Look at the polls. A message about complacency or both-sides-ing? Look at us complaining about Biden.
I don't need anything to be in the movie. Alex Garland's commentary has ensured that I'll never see it.
I just find it funny that so many of the positive reviews are from liberals doing what you're lambasting while Garland himself wants nothing to do with it.