JJ is a great hand if you know how to play it. Most inexperienced players struggle with it because they either play it too passively or to aggressively and find themselves in tough spots. It does require some nuance. Its a hand that you want to typically raise, and occasionally jam in the right scenario. When you flop an overpair with it, you should generally go with it on 100bb stacks. When you flop middle pair or worse you should look to get to showdown or fold to aggression. Its not always a fun hand to play, but with basic skill you should do quite favorably.