Guild Wars 2

spent well over 2 hours doing Tarir events to be DC’d mid event on what looked like it would be a full Octovine clear, then reloaded on a map with the event complete, and no credit and no way to get back to my old map?

and it happens all the time.

is it not possible to put people back on the map they were last in in case of a sudden disconnect?

By some theory it should be. Unless someone else took your spot in that map and now it’s full by the time you got back.
Cause I know that every time I crash and come back my participation level didn’t reset. So it does remember I was there.

So you should always have a Anti DC party when you are doing big things like that. Just in case.