These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Idiot Ball: Jill at times, especially inside the school, where she decides the best course of action is to split up; give a gun to a civilian with no firearm training (and not even bother to instruct her how to use said firearm); and send the clearly unprepared woman on her way. Terri, of course, dies horribly.
Mary Sue: While Alice is this in each film to some degree, Apocalypse is possibly the worst example in the series, including, but not limited to:
GodModeSue: Remember how powerful and fearful Nemesis is in the game? Alice defeats him without breaking too much of a sweat, using only her fists and a pair of police batons. And where Jill and the others struggle to land even a single shot on a bunch of Lickers, Alice takes them out with only a few bullets and an exploding motorcycle.
Black Hole Sue: Everything in the film eventually boils down to Alice. Have some survivors actually being competent? Alice shows up to save everyone at the last second and make them look like incompetent dummies. Umbrella's focus also shifts from containing the virus to getting Alice, essentially making the entire outbreak a testing ground to see how powerful she is.
Jerk Sue: At times, Alice doesn't seem to be the slightest bit interested in actually helping others, and implies that it's inconvenient for her to do so.