Not really doing anything wrong. Unfortunately, hunting in wormholes is a very hit-or-miss affair at best, with more misses than hits. I can explain the deeper reasoning behind this in greater depth if you like, but the ultimate point is that the odds of finding a hole with active people in it aren't super high.

What you might be better off doing is finding a wormhole with a nullsec connection, and then hanging out in there. That way you can pop out and harass any locals, using the map to check for nearby activity if there's no one else immediately there.