Leonardo was such an amazing person.
I know! He was an Italian inventor as well as a painter!
He did so much in his life he was so cool.
It's actually crazy! He was also a sculptor and an architect!
He was so many different things. it was crazy.
It doesn't even stop there. He was very into science, math, music, and engineering too.
I dont know why he saw himself as a failure, he did more than nearly anyone.
I really don't know how you could see yourself as a failure if you were into all that as well as writing, history, and even cartography!