I’ll try to keep this as spoiler free as possible.
I try not to get people’s opinions on media upset me. However, when it comes to comic book movies and I hear the line “I don’t like it because they changed X to Y” it really gets me. Do you not actually read the comics? Some characters have 25, 30, 50 or even 75 years worth of “backstory”. Things are constantly changing. Heck, DC literally retconned their ENTIRE UNIVERSE. Tony Stark has heart problems in 616 and brain problems in the Ultimate Universe. It just seems like such an easy out to explain why you didn’t like a certain movie. You could just say you thought it was bad movie (like IM2 or Thor was in my opinion).