I have elaborated on the sudden appearance of flowering plants in the Lower Cretaceous, which was called an “abominable mystery” by Charles Darwin.
If an asteroid impact wiped out the dinosaurs as believed by the scientific consensus, its effects on evolution seem strained and inconsistent.
A major study looks for evolution, but finds huge disparities, stasis, gaps, periodic explosions, and miracles of emergence held together with imagination.
There is one remaining issue to address, which is palynology, the science of fossil pollen.
You are in good company if you are as skeptical about these claims as I am myself.