The asteroid that caused the Cretaceous–Paleogene extinction event was also just a blip on Earth’s history, it did however succeed in making life on earth miserable for a few thousand years, wiping out 75% of the all the species in the process.
In your analogy we are not the frog though, we are the pot, and we are the asteroid, since we are the ones causing the catastrophe. Except on geologic timescales, the pot isn’t slowly being boiled, it is being pressured cooked on a thermo-nuclear reactor. Extinction events are seldomly this sudden and extreme as climate change is currently.