Yes, I bought a bunch of juices from Rockstar vapor, too, and could not vape any of them - they all had the same off-putting taste. I went through a rough, and expensive, few weeks trying to find a juice I liked. I don't tolerate PG well, and I was searching for a VG juice that I liked. The first few vendors I tried ALL had "it". Dozens of bottles of juices that smelled great and tasted awful. Since it was in all the flavors I tried from those vendors, it must be in the nic base that they use - maybe part of the extraction process. It was so frustrating for me.
Fortunately, I now have reliably delicious juices and I can turn my attention to finding the perfect carto.