As a new player, running through the Praetorium dungeon was the worst

[Kling-Klang]

You're right to be angry. This has been a long going problem, which is the reason why they changed how the final dungeons happen in Heavensward and Stormblood. Unfortunately, this is the norm for people now. People will actually kick others if they want to watch the CS. It's disgusting, and I really wish they'd do something like split the dungeon into a bunch of trials or something.

I never saw people getting kicked for cutscenes, People just ignore them and keep runing and finishing the dungeon by themselves. Since it does not matter if others watch or not. You can do most bosses with just tank, healer and one dps.