I know this is probably a common topic. For me, I’m not sure if it’s a “trope” or just totally misinformed writing, but it’s how many authors approach alcoholism. Some examples are Girl on the Train and The House Across the Lake, among HUNDREDS. If anyone else here has struggled with alcoholism, you know it’s not just "i woke up after downing an entire bottle of whiskey but was able to shower, down a cup of coffee, and solve a murder. "
Keep in mind that all tropes can be done well, and often were done well by some classic book. But then they get overused or done badly and that’s when I find them irritating.
Love triangles that take forever to resolve. Make up your mind!
Multiple fake-out deaths. After a while I just want someone to really die!
On the other hand, I’m also tired of so many people dying that all the people I liked are gone, and the few remaining original characters now have impenetrable plot armor because someone has to survive from beginning to end.
Historical fiction or fantasies that romanticize the past to an absurd extent.
Orphans. So many orphans.
Reckless protagonists who never suffer the consequences of their recklessness. Sensible friends who are berated for being sensible. Or maybe they are persuaded to be reckless too and find out it’s great and there are no consequences.
Traumatic incidents that leave zero scars and are never referenced again.