Why do your ducks hate you? Because you look like a Tyrannosaurus Rex who just isn’t hungry yet. Ducks are prey animals. In the wild, even the appearance of a lion makes a herd of zebra nervous, whether the lion is hungry or not.
Being slow and gentle helps, but it doesn’t work all on its own. Like tmorgan46 said, treats are one of the best ways to win a duck’s heart! You can try offering them lettuce, worms, cucumbers, tomatoes, watermelon, pumpkin, cabbage, etc. (Worms are the best, I think. We raise mealworms just to feed our ducks.) Eventually they might even take it from your hand. They might never be tame enough that you can just walk up to them and pick them up, although I’ve had a few that do that, but with treats they should at least stop running away every time you walk in there.
Most ducks hate being picked up, but most will accept being petted when they’re tame. With some of my more skittish ducks, I touch them or pet them a little whenever I give them a treat.
Oh, and don’t chase them or force catch them unless absolutely necessary. That scares them to death.