From: VincentLauw | #038
maybe my tastebuds are ****ed up but the first one always tastes bitter to me no matter what
It's not your tastebuds, you're just not cooking them enough.
If there is any hint of raw whiteness in the onion/garlic, it will be sharp and bitter. If you roast them down to a brown mush, they are extremely sweet. I can understand calling roasted garlic 'not sweet' because even when it's really cooked, there is still a hint of sharp flavor, which might come across as bitter to you, but the onions should be entirely sweet.