"You do not have any evidence"
"Mammals are tougher than reptiles"
"Time frames are fake, it's just assumptions based on decay rates"
NONE of these statements are true, and evolution as a whole is not an assumption.
*inhales*
Firstly, you can't link timeframes to only decay rates. There are many, MANY factors that make up our current evolutionary timeline, including carbon dating, the position of the fossil in the earth's crust (the deeper you go, the older the rock is as sediment builds over time) and many others. Secondly, we do have fossils predating the cambrian explosion, but it stops at a certain point for the simple reason that soft-bodied life usually can't fossilise at all. Only parts like shell, carapace, bones and teeth can properly fossilised, so the fossils "appearing out of nowhere" marks the point of soft-bodied life evolving shell and carapace. Also, you vastly overexaggerated the scale of the cambrian explosion. 42 new phyla developed, not the thousands you stated. And separating scientific fact from assumption is a very poor choice of words considering you're stating that the way scientists measure the age of fossils is fake. The meteorite did not kill species by bringing an ice age, it brought immense clouds of Ash, debris and gases into the atmosphere, as well as causing a gigantic heat wave. Effectively, it did the exact opposite of what you described. AND there is clear evidence showing that hunter-gatherer type civilisations built megaliths. Mammals also EVOLVED from reptiles with hairlike protrusions, contradicting the "fact" that they all existed at once.