The first IM is always the best and a favourite for me. I prefer the 3rd movie to the 2nd, largely for Tony's PTSD and his scenes with Ty. I tend to ignore the whole Mandarin fake out and due to having no comics background knowledge, I register zero internal rage against it. It's disappointing, sure because it reduced what could have been a great IM movie with a great villain (I mean they got Ben Kingsley in the MCU) into something mediocre for a lot of people.