I started on Vivi Nova's and Protanks, went to a Kayfun and thought my world opened up. Then I stepped into the realm of dripping and sub-ohm builds. The Kayfun, that I loved, became a meh vape. I loved the airy draw and intense flavor of the RDA. Lately, though, I've gone back to the Kayfun/Provari combo and feel it's an ok vape again. Still enjoy dripping a bit more, but the Kayfun satisfies me throughout the day, with the convenience of the tank.
So in my humble opinion, just clean out the Kayfun and put it away for a bit. You might one day go back to it and love it again. One thing I can say about vaping, is that your tastes do change. What is great today, you'll grow tired of tomorrow. Then one day, you'll try it again and think, "damn, that wasn't that bad. Wonder why I put it away for so long."