If all puppers evolve into doggos, but not all doggos evolve into big woofers, does this mean evolution is fake?

The thing is, this is just micro-evolution Once the puppers become doggos more often than not, they are fit enough to survive and make their own puppers In the rare event that the doggo isn't fit to survive it will evolve further into a big woofer

No. Just not every doggo levels up enough to become a woofer.