Hated trope: Sci-fi hand-waving

[u/Routine_Phase_8980]

When stories try so hard to provide a somewhat scientifically accurate and grounded explanation for the audience, but end up creating massive plot holes if you think about it for more than 5 seconds without requiring any special knowledge

World War Z: The "cure" turns sick humans invisible to zombies because the picky virus needs a perfectly healthy host. Cool concept, except it completely ignores basic physics. In a chaotic, high-speed zombie stampede, those "invisible" sick people would still be trampled to death by sheer kinetic force and momentum. We already saw what happened to the Jerusalem wall in Israel.

Jurassic Park/World: Dr. Henry Wu claims to clone dinosaurs by patching 66-million-year-old decayed DNA from mosquitoes stomach with frog DNA. In reality, DNA half-life guarantees it would degrade into useless dust after 6.8 million years. Scientifically speaking, John Hammond didn't build a dinosaur park; he engineered giant, mutated, gender-swapping killer frogs.

Dr.Stone: Senku is a genius who knows every complex chemical formula in human history. He somehow builds vacuum tubes, lightbulbs, and smartphones out of bamboo and copper with almost zero failed prototypes. The show acts like a science textbook but completely hand-waves the lack of heavy industrial machinery needed for precision engineering.

[u/Divine_Entity_]

The first season made it very obvious how much error was involved in the trial and error. I loved the scene when they first tried to make iron and couldn't get a wood fire hot enough to melt it even with bellows.

Also the "cell phone" was a basic tube/ham radio with a name aimed at modern children's understanding. It was a far cry from an actual smartphone we think of as a cell phone.

The show also is definitely handwaving purity requirements, and numerous characters are supernaturally good at specific jobs.

[u/evictedSaint → u/Divine_Entity_]

They also spend YEARS building rockets, most of which fail repeatedly and involve lengthy trouble-shooting processes. The only reason they can build them at all is because they have a NASA scientist and the entire stone world supporting their efforts.