I’ve had bugs eating the broccoli and cauliflower but taking my thumb and forefinger to them has solved the problem. Squish!
Their relatives just come back and hand-picking bugs takes hours.
I try to use organic methods, just to not expose myself or family to poisons, too, but I do not agree to leave a portion of my crop to the critters. They don’t think about what to leave me, after all. If the bugs move in, I dust.