Should I cut off crispy fern leaves?

Yes, this could be a good plan. If you wish to maintain it, you should probably prune it to promote healthier growth.😊

I think it's better to just cut off the damaged leaves

Indeed, cutting the crispy fern leaves will make it look better. Many people adore this garden because of its vibrant green leaves and robust leaf structure. And my answer is yap! You should cut it off!

Yes, you'd better cut back the leaves.