Experience with Standout? Extremely astringent

Getting terrible results with this one. Close to 1 month off roast. I tried gkrven grinding significantly coarser than usual and lowering water temp, but it just tastes extremely astringent. It makes me thing this is a espresso roast and they mislabeled it.

Ratio 1/16. Third wave water, orea v4. Tbt as low as 2.15 for 300 ml.