You obviously don't know the difference between cosmic and nuclear radiation. I do. Part of my work in the military involved nuclear decontamination. We never had to do it for real, thank God. But I know the difference.
Whatever research you find to show that flight crews are affected by cosmic radiation, I can find other research that debunks it. Skin cancer? Rubbish. Skin is damaged by UV. UV does not get through the aircraft skin. It will get through perspex. Unless things have changed in the last few years, flight crews are fully dressed, so UV does not affect them.
What do you imagine the space suits are made of? It's not a layer of mylar, that's for sure. Do you bother to do any research at all, or just take some troll's comments as gospel?
https://www.nasa.gov/feature/spacewalk-spacesuit-basics