Is party 3/6 game too tough / or I am just not good enough?

[fallout1234]

I recently moved up to 4 tabling party 3/6. Had some good days, then went dry. Most of my gains are from bad players calling me down to river. Once those fishes are gone, the table turns really tight and I have trouble finding 4 good tables. It's not unusal to have 2/3 people seeing flops and pots under $20. I am tired of changing table all the time.

I am not sure if I am no good or the game is bad.
I still hold a 2BB/100hands stat, but my sample is small and I haven't won for a few days.

I wonder if I should stick to the game and try to improve and see if I can beat it, or find some better place or level to play?

Thanks for any suggestion.