Rewatching TOS. Holy crap McCoy is inappropriate, belligerent and the worst member of the away team. He refuses to contribute outside his role as a Doctor or contribute to any investigation other than to offer opinions and snarky quips.

Example: S2-06. Doomsday Machine.

Solar system completely destroyed and they are investigating on the Constellation.

Kirk: Bones, did you ever hear of a Doomsday machine?

McCoy: I’m a doctor not a mechanic!

🤣