For example, you really love SPAM for some weird reason. Then you decide to take a trip to Spain, where you fall in love with genuine Spanish ham. Then, once you come back home, you look at a can of SPAM and you're completely disgusted.
You could say that ham spoiled you for SPAM. Here's an example of the phrase from a novel by Jack London:
Yet the beer seemed not as good as of yore. It didn't taste as it used to taste. Brissenden had spoiled him for steam beer, he concluded, and wondered if, after all, the books had spoiled him for companionship with these friends of his youth.
"Jaded" is a word that comes to mind, as is the unpretentious "spoiled".
Example: "While on a brief visit to her hometown of Bushyhead, Oklahoma, Jennifer barely sampled the simple but hearty fare she used to love. Her tastes had become jaded during the years she was married to a Wall Street executive."
Dissatisfied does suggest that you might have liked something before, so it may be what you're looking for:
dis·sat·is·fied di(s)ˈsadəsˌfīd/ adjective adjective: dissatisfied
not content or happy with something. "small investors dissatisfied with rates on certificates of deposit" synonyms: discontented, malcontent, unsatisfied, disappointed, disaffected, unhappy, displeased;
That's sometimes referred to as having fickle taste.
M-W defines "fickle" as marked by lack of steadfastness, constancy, or stability. You liked SPAM until something else came along.