Things to think about before you call someone "Bad"

[Gallus]

There are also some environments where players shouldn’t be giving other players advice on the basics of mechanics and job rotations; the players should already have an understanding of both. Of course, I’m referring to Extreme trials and Savage/Ultimate raids, here: content that requires competency and a higher standard of play.

I never argued over a PF party. In a PF you are on your perfect right to decide whether someone is pulling their weight or not, I still think kicking should be done in a polite manner, but the rules of a PF should always be respected. If the host is attempting to create a farm party and somebody who hasn't cleared (and has no clue how the fight works) joins, there's no valid excuse there. Same goes for a static. You set the rules. People either respect them or you leave them out.

But a dungeon with random people is a different sort of scenario. You don't set the rules there, you just queue with 3 other people and try to enjoy the instance (or get it done as fast as possible in the scenario you are just there for your daily tomes), that's where I keep saying people in general should be respectful and tolerant, because you'll keep coming across very different people, from speedrunners that will evaporate packs of mobs and bosses in the blink of an eye to clumsy healers that will fail to heal a moderate burst and possibly cause a wipe. Some people even use level 70 dungeons as training grounds to get familiar with their rotations so that they can later feel more confident against EX Primals or savage; and that's completely natural because dummies do not provide you with a real context where you have to handle your rotation all while dealing with a certain amount of mechanics (even if they are simple). You are setting up for disappointment if you expect high level of gameplay in dungeons. And "acceptable levels of gameplay" falls into the ambiguous category. "Acceptable levels of gameplay" will vastly differ from one player to another.