Like, I developed a ridiculous bias against vegetables as a child, and even as an adult whose tastes have changed, and I can put the corn and peas into my mouth and taste them and objectively think "This isn't that bad, it's pretty decent actually", I can't help but just look at them and my brain is screaming at me to just immediately put it into the garbage. I'm mildly upset at myself for retaining my immature taste in food all the way up into almost middle age.
I mean, I'm pretty middle age at this point and can't even put the corn and peas in my mouth and think "this isn't that bad", because they both taste objectively horrible to me, like
most vegetables, and have since I was a kid. Your taste in food is your taste in food, there's no mature or immature to it. It can change, but its change is its change and your change, not some kind of adjustment on a maturity scale of taste.
Exposure may or may not work, I've been trying for over a decade to develop tolerance to the stuff and almost all of it tastes as shit on day 4200 as they did on day 1. There's been points when trying has outright caused me to vomit due to the stuff just tasting
that goddamn bad to me. Most gains I've managed for all the trouble is not having as much problem with onion
powder, if it's used lightly (and anything it's in tastes better if it's just... not).