I have been mostly building Antweights, but spinners are very much part of the game, I think. I've had some robots quite badly damaged by spinners. But on other occasions I've beaten quite competent looking spinners with little damage.

BUT there are a lot of spinners in the field (especially Ants) which are "glass cannon" or "one hit wonder" robots - if you can survive one hit, they probably won't be able to hit you again, if they can even still drive.

Newton's turd law - every hit comes back to hit you.