Evolution is not something to believe in, it is a matter of accepting the available evidence
If you take “micro-evolution” has we have observed and give it 4.5 billion years you will end up with the diversity of life we see today.
Lets take a look at the wolf, if man can turn a wolf into a Chihuahua in a few hundred years, just imagine what nature can do given billions of years.
You are presenting an Argument from personal incredulity. Just because it is something that we cannot understand is not proof that God did it.
You have perfectly stated the argument for faith in God. Think about it.
And, no, having intelligent people working over a period of thousands of years to turn wolves into chihuahuas, is not the same as turning a trilobite into a giraffe. Simply saying "it took a long time" isn't a powerful argument.