aerus

Im a casual PLO player and rarely play online. Im used to playing live loose PLO games.
Both villains were playing very aggressive and were caught on bluffs.
So the question here is , should I have give up when I flop the 2nd nuts and there is no table improvement by the river?

Hand 1:
6max
Villain is deep 250BB , Hero is 150BB. Villain has position over Hero
Hero: Qc 7c 8c 2d
Villain Ac 3c 5s 7d

Pre flop: Hero 3xBB , Villain calls for 3BB

Flop: Kc 4c 9c

Hero bets 1/2 pot , Villain calls
Turn is 3d ( blank )
Hero bets 1/2 pot, Villain raise all in , Hero calls
Villain has nut flush , Hero has 2nd nuts and is drawing dead

Hand 2:
6max
Villain is deep 300BB , Hero is 100BB , Villain has position over Hero
Hero: K Q J 9 rainbow
Villain: A K J 10 rainbow

Pre flop: Hero 3x BB, Villain calls

Flop: K J 10 rainbow

Hero check , Villain bets 2/3 pot, Hero calls.
Turn Blank
Hero check , Villain bets pot, Hero tanks and call
River Blank
Hero check, Villain goes all in , Hero calls