Good morning everyone, the secret is to play your hand according to its strength, forget about the cards in your hand and think about the villain's range.
Pair of JJ is the worst pair in the deck, it depends on how you are playing with them, it depends against which villain's range:
Villain opens from UTG with 25bb, 2x open, you are in the BB, with 25bb what is the best way to play this hand against UTG's range?
Against the range of the UTG villain, there will be many strong hands AA, KK, QQ, hands that preflop you have less than 20%
equity, if it is AK or AQ, almost 50% equity.
Now let's imagine that you are in the BB 25bb, the table is folded and the SB open 3x with 25bb, now I ask you is JJ the worst pair?
Of course, it's not just about playing your hand post-flop according to how strong it is.
If you have JJ and are playing a multiway bridge vs 2 or 3 players know that the probability is high of hitting a card above your JJ, like A, K or Q, and your J doesn't hit someone bet flop and another villain calls, depending from the texture of the board your JJ is a fold.
There are softwares that solve the moves, if you study your JJ using this method, you will leave the belief that it is the worst pair and will become the 4th best pair.