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.
The UMBRELLA corporation at the end. They've managed to capture a superhuman that has sworn to destroy them- and they give her insanely powerful telekinetic powers and then let her go.
The UMBRELLA corporation kills the population of an entire city just so they can find out who would win in a fight between Alice and Nemesis.
Even better, they cover up their nuclear strike with a story about a nuclear power plant melting down, because somebody at Umbrella apparently thinks that a catastrophic nuclear meltdown that kills millions(making it worse then Chernobyl by a long shot) isn't going to be investigated by the US government.
Sequelitis: The first film is recognised as a decent thriller that, while different from the games, is still good and watchable. This however marks Alice's turn into God-Mode Sue and an overall step down in quality.
Took the Bad Film Seriously: Sienna Guillory spent lots of time studying Jill's movements from the game and putting a lot of effort into her role. Notably on the DVD commentary, she keeps things serious while Milla Jovovich and Oded Fehr are goofing off.