We all do these things differently and have different opinions. Once, when I opened the pop door every chicken was on the ground within 15 minutes. I've had them take 3 days before the last one hit the ground. My broods are usually in the 20 chick range. It is the same coop, no adults around to intimidate them, and the same breeds or mixes. It can be amazing how different one group can be from another.
I have food and water in both the coop and run. However they want to go about it is fine with me. They are well taken care of.
Once they are in the run mine typically don't want to go back in the coop to sleep. They go to bed under the pop door. After it gets dark so they are easier to catch I lock them in the coop where it is safe. One time I had to put them in that coop once and every one of the got the message. A couple of times it has taken three weeks for the last of them to catch on. Usually a few start going in on the second or third night and by a week all of them are going in on their own at dark. Each group has its own dynamics, it can be amazing how different one group can be from the last.
I do not have a ramp, I used steps. In the morning most of mine fly to the ground instead of using the steps. At night, half of mine fly up and half hop up the steps.
You don't say how old your chicks are but it is not that they are traumatized by the ramp. If they don't know how to use the ramp, they could probably fly up if they wanted to go up unless you have Silkes or others that can't fly. They simply do not WANT to. You get them ready to go into the coop to sleep by putting them in there to sleep every night until they get in the habit of sleeping in the coop. Once they WANT to go to sleep in the coop they will get there.