I don't like Iris all that much. The writers seem to focus on weird things for Iris, especially with Axew knowing insanely strong moves. I don't know why they're beating around the bush and not letting poor Axew evolve, so Iris focuses more on other dragons than she does for Axew. That makes me side-eye her character overall, but it's not overly bearing, so it's somewhat tolerable. However, Iris isn't my type of character. I don't like her personality, so I don't like her nor do I find her design all that great to look at.
For me Iris as a Character I am fine with. And yeah she says "What a Kid" but all of them have their quirks that we don't generally care for. She seems to change the pace of coordinators back too tomboy like gymleaders, which is kind of welcomed to me by now. Iris also has a jungle girl aspect that interests me as well.