Using "Survival of the fittest" as the argument for macro evolution (across species) is an instant fallacy if thought about for even a moment.

The fish that starts to grow wings is no longer the strongest, and would die before it has time to reproduce and after x amounts of such reproduction with such between forms we finally have a bird. Plus all of those between species should still be around, as they would have needed to be the fittest, but somehow we only have the fish and the bird, but no between ones, more has it ever been observed when a fish gives birth to a bird.

So, the evolution theory actually requires a God to keep those between species alive. 🤣