I understand your pain
Been there, done that!
Actually I used two nets. One bigger (about 15 x 10 cm) and one just a small one.
I had to remove a couple large plants. I have one tall piece of a driftwood in the middle, so I placed the net between it and the glass on one side. Then used the other net to steer the fish around the driftwood and they had nowhere to go but in the net. Of course they escaped many times and I spend over an hour until I caught all 13 of them in my 55 gal tank. So, try over and over again and you'll catch the suckers...
Oh, when I have several fish cought in the net, I raise them to the surface but do not remove them from the water completely. Then I use the smaller net to catch the individuals I want from the basin formed by the big net. This way you can eaily select what you want and release the others...