Learn English – Antonym for Perception

While indurated and hardened are probably better when you're intending to exaggerate (although indurated is not in common usage and sounds somewhat pompous), I would recommend the phrase used to:

"I've gotten used to wearing uncomfortable shoes; I can wear anything on my feet now"

is the most common opposite of

"I've been spoiled by these comfortable shoes, I can't wear anything else now".

Advance is awkward in that context. Simply say, "Go to the next page." The opposite is "Go back to the previous page."