1) Evolution doesn't have a direction so it doesn't "move towards" anything.
2) Evolution is observable. Here are
8 examples and there are loads of others in pathogens and short generation time insects. For example you can see evoltuon in fruit flys in a simple lab experiment. And human (and most other sepcies) evolution is observable from the fossil record. Humans have also demonstrably evolved as we couldn't digest milk until after we started farming a few thousand years ago. This is a blink of an eye in evolutionary terms.
3) Most evolutionary "failures" aren't even born but humans with disabilities are in some cases in effect failed evolution - not dissing the disabled here, just talking biology - because changes have occurred due to a genetic change/recombination/mutation that often results in less reproductive success than the average for humans. An extreme example is
https://en.wikipedia.org/wiki/Atacama_skeleton and there are lots of others around that the religious tend to just ignore.
4) Whale evolution is quite well understood even if the "transitional" fossils you seek aren't hugely numerous die to the habitat they lived in not being condusive to fosdsilisation just as bat evolution is less well documented than other lines due to the environment they lived in and their lightweight bones not fossilising very well.
5) God of the gaps: The list of transitional fossils we have found is actually huge and covers all the main lineages
https://en.wikipedia.org/wiki/List_of_transitional_fossils and here are the main groups that people seem to like to pretend don't exist
http://www.transitionalfossils.com/ and another interesting article
http://www.livescience.com/3306-fossils-reveal-truth-darwin-theory.html