Not sure what you mean by "something wrong with drop shot." Yes. There is something wrong. The number 6, 1/2 ounce weight is broken. It causes several functionality issues. The devs have been working on it. Don't use it. Im not sure what devs had in mind when they put this feature in. Going by the rig, its drop shotting. If you go by the lure descriptions, its called "vertical jigging." The drop shot irl, is not used the way the devs are trying to use it in The Catch. Im not sure why they put this in. So, given the situation of what you call "broken," take what you will from this reply. I believe this feature should just be removed. I don't know anyone that uses it.
i have had some very limited sucess with dropshotting, but as you say its not how it is in real life in the slightest, and very inconsistent and awkward in the game, works great for zander on rotterdam if you can get the hang of it