Does he really LOVE his food? I trained mine to enjoy going in his cup by feeding him in it. Right now your fish thinks net= bad things. They're smart, they remember.
I got Tango to eat pellets out of my fingers and from then on he'd follow my finger where ever I led him which was right into a breeder's cup. Then I feed him in there. Cup = food. He still tries to swim away sometimes but he comes right back when I put my finger down and lead him.
Just make sure you hold the cup on it's side, hold it still in the water and let him swim into it, then you tip it up slowly. Don't chase him, make him come to you. It might take some time and patience to master but it's MUCH easier and much less stress. And the clearer the cup, the harder it is for him to see.
How long have you had him?