Dill is an annual, self-seeding plant with feathery green leaves. It is used most commonly in soups and stews and for pickling. Dill weed is easy to grow and attracts beneficial insects such as wasps and other predatory insects to your garden.
To create a permanent dill weed patch, allow some of the seeds to self-sow each year—you’ll have plenty of early dill to start the season.
We are inclined to think the problem is in the soil. Dill will grow in poor soil; but if you have not already, you could try well-drained/draining composted soil, and full sun. There seems to be enthusiasts of both camps (poor soil, composted soil).
It does not do well when over watered or in rainy season. One other thought, going back to the soil: What is the pH of your soil? Dill likes a neutral pH of between 5.5 and 6.5. An extreme acid or alkaline soil could be the issue here, if all else is as it should be.