I switched to a rubber lined net to reduce scale and fin damage. I also pull them into the boat quickly to more easily remove the hook. The fish are tending to spin and roll causing the leader line to entangle in gills. You are correct though, I only pull and photograph a few of the 20 to the boat.
Overall, I follow DFO and UBC recommendations on catch and release - minimize time out of the water, use a rubber net, and don’t handle the fish. Also, spoons with single barbless hooks are the easiest to release.
Some have suggested using a gaff, I’m not sure that’s better for the fish.
Proper catch and release is part of the “sport” of fishing.