Question: I'm looking for an antonym of the word *spoiled*.

The sense of *spoiled* I have in mind is a positive one: "I've become spoiled by these comfy shoes."

I'm looking for a word or short phrase to say: "I've become *antispoiled* by these horrible shoes and now any other pair would be comfortable."

The closest phrase that I'm aware of is *to have one's standards lowered*, which isn't quite the same thing and certainly isn't very pithy.

Answer: 
Wouldn't an anastrophic antonym be the same word? If the word's meaning is reversed to mean its opposite (negative to positive, visa-versa) then wouldn't the word be the antonym of itself if taken in its original definition?

"I've become *spoiled* by these comfy shoes."

"I've become *spoiled* by these horrible shoes and now any other pair would be comfortable."
* I've become so put-off by these horrible shoes.
* I've been so abused by these horrible shoes.
* I'm so darned fed up with these . . .