Tell me exactly just how does one "learn" by playing CT how the zombie dragon works?
Either you're the idiot that is slowing everyone down or you have pre-learned the mechanics.

There is literally no way to tell visually the cause and effect of the mechanics of the skeletons. Same goes for many other elements like spiny plume and stone pillars. Either you're taught how they work or you will not know.

Now I'm not saying this is your fault but the game does a fairly lousy job at visual communication with the more complicated mechanics.