Are pocket Jacks a cursed hand?

Pocket Jacks are higher than 1010- on preflop. Everything else is just math and probability theory.
Or psychology if we mean our minds during the game.

No, they are not cursed but knowing that there are three over cards that people love to play makes them extremely difficult to have faith in. I play them passively, using them as bluff catchers unless I hit a set. Then they're a monster.

It's a second category of value hands, which often might be perceived by players as a first category of value hands, therefore is misplayed or is met with bigger expectations than this hand deserves. Just realize right away, before playing it, that you have to be able to fold it if circumstances will be unfavorable.

Also, keep in mind your position and your role in preflop betting. If you were a pre-flop aggressor, then A,K or Q on the flop are good cards for you, because your range (as PFA's) fits this flop perfectly. So you don't just refuse c-betting because "well, I have JJ and there is A/K/Q on the flop"...