You stirred the cauldron is extremely annoying, since bats tend to love to pick off your tamed animals and unless they are fully enclosed, there’s no good way to prevent it. Apart from that, the raids are not very difficult, and you can typically prevent damage to your base by catching aggro of the mobs that spawn.

On a side note, I did get the “what’s up gjall” raid once but didn’t actually see any gjall spawn. I was near a base I was building which would have made it extremely annoying but I just sat around waiting and none ever spawned. Don’t know what happened with that.