Physicians scatter at my dawn approach, though I've never held a degree. While my bite doomed paradise and a princess. Discord's golden trophy shares my name. What am I?

I'm the cruel corner that devours your pinky toe at Three AM. I'm the jutting traitor you curse while limping through darkness. Mountains wear me proudly; your furniture hides me maliciously. I'm where surfaces end without warning. What am I?

Paired with a channel, Means to restrain, Paired with a colour, Puny fury is pain, The same colour though, Makes one think of rain, Cut off my tail, I'm youngest to reign

An act of complaining without offering solution, often tied to a child as it spares the adults feelings. A Karen or Ken may do this as they call a manager, it's simply a petulant act by a childish person. People who complain, but make no effort to make things better do this...

Of all the inventions that have been made over the years, I am generally considered to be the most remarkable. What am I?