The weevil larvae may have destroyed your plants, but really you are looking at a handful of fresh new seedlings and not the detritus of a former favourite plant. Seize the opportunity to split and grow on. Enjoy the problem and take a positive attitude toward the challenge.
This insect appears near the top of every list of annoying insects. It is very destructive and action should be taken if you come across it. The adult weevil does not do terminal damage to a plant. It may make notches in the leaves, but most plants can shrug it off. The damage is done by the hundreds of larvae that grow from their eggs. These larvae live on a diet of plant roots, and with a bad infestation, they can chew until your plant is severed at the ground. They also cause so much root trauma that when the plant explodes into growth in spring, it dies because it cannot take in the necessary water to support its leaves.
Why not choose from among the best varieties of a plant? The RHS takes pride in trialling varieties in order to make recommendations, and it has a catalogue of those varieties that have been awarded the AGM. It is not perfect for all the many extra thousands of varieties around the world, but it can be a useful reference for us.