The common explanation is that Hershey's chocolate contains some amount of butyric acid which tastes/smells like vomit. Adam Ragusea on YT did a pretty solid video on it.
Why Hershey bars taste like vomit (and I love them)
Not all US chocolate tastes like Hershey.
I'm really enjoying Bazzite for gaming and uCore for servers. It's reassuring knowing that I can just rebase and revert to a known good state with working drivers easily. Highly recommend a try