Odin gave an eye to get access to dev commands. He might think you were a bit dense and possibly ungrateful if you didn't use them once in awhile.

My personal theory is that you were not one of the greatest fighters as the scroll texts said, but for one reason or another, Odin decided to give you another chance. It would be embarrassing to show up in Valhalla without any good stories to tell. And if you couldn't get yourself together enough to create any good stories? Too bad.

He also enjoys taunting his enemies by having puny weaklings defeat them over and over again.