I kind of went through this with 15 gallons of 2018 Primitivo, which is the same, basically, as Zinfandel. Added the 100% new oak recommendation of StaVin cubes. At 6 months, it was campfire like and undrinkable, at a year, it was a bit better, at 2 years, better still. At 2 1/2 years it is drinkable. It still has too much oak flavor for me but it's OK. It isn't a wine I give away, but I do pull it out from time to time. It's better if you open an hour before you drink it, and better still if poured through an aerator.
So that's my advice. Give it a couple of years, use an aerator and make the best of it. The oak flavor came down roughly 80% from where I started, and it taught me a super valuable lesson, so I'm good with it. I think I still have 5 cases of it so it will be around awhile!