SCs inability with tomatoes

Unbelievably frustrated. Had to throw my  first almost ripe tomato away along with lots of green ones. Because they’d been slugged or caterpillars. Picked off 3 feet caterpillars at same time. A massive slug was just getting comfortable to start munching when I went in to water this evening. He was removed in a very undignified and violent manner!   

Then I did this

   

Every bit of copper pipe I had. Even borrowed some from pumpkin! Fingers crossed I manage to pick one whole tomato. That all I want . Just one!