The members of 'the team' that does all the action/adventure/detective work is also each other's love interests. New love interest characters outside the team eventually join the team. Bit of a lazy way of fitting all your characters in.
Why can I now see Tina Turner in her Auntie Entity getup from Max Max: Beyond Thunderdome breaking into Hogwarts and kicking Voldemort's backside?
Honest I hate writers repeat the same formula for the plot in the sequel and the next one and the next one until you want to shoot yourself. That happened to me recently and I was done after the second book.
This is more of a general writing pet peeve, but can definitely relate to plot- telling instead of showing. For example, "Susan thought he was the most gorgeous thing to walk this earth" vs showing Susan's actions that imply she finds X character attractive. Also I have zero issue with books centering around teens and their adventures. It's the fantasy (usually urban or modern) novels that forget their characters are teenagers and just focus on "super mystical power or strength they have to fight". I mean, I wasn't a teen that long ago and I feel like if I discovered I had supernatural powers, it wouldn't be the center of my world. I feel like authors will forget that teens are still honestly children and that they are "invincible adults". If that makes sense. Maybe I am biased now that I'm in my early 20s, I'd like to read content about early 20-something year olds that I can relate to (even if it's fantasy).
Honestly, I never even notice telling. If it's an interesting book, it'll read just as well whether showing or telling to me.