Difficult to say.
I do like Piemontese Nebbiolo and also old-school style, which means I accept that they may be truculent b*stards in youth, but then I'm banking on being interesting in a decade or three away. Sometimes they come round, sometimes they don't. Personally if I know a wine is in that style I'll give it 15-25+ years from vintage to accept the gamble (I've barely dipped into my 1996s yet - and then from wines that were likely to be lighter framed). Where I'd be less happy taking a gamble, is in a wine that is likely to be heavily structured and it's still in it's youth. Sometimes the fruit is still there strong enough to make it work, but often it can just be tough carapace of a wine.... just as you've found
There are plenty (especially from the modernists) that offer drinkability at 5 years old. Some I'm sure will age well, maybe not in the same way, but they seem to have found a better middle ground than some of the more radical early modernist wines. 2000 Molino Gancia Barolo has been a pleasure to drink for as long as we've had it - it has a better balance for drinking in it's youth. Not sure where it will end up, but we have a few more bottles & will see.
Drink coffee, do stupid things faster