So, your suggestion is that everyone with experience who aren't willing to teach other's shouldn't queue for DF. I agree. Now, how are we going to go about enforcing that? Is there a way or are we just saying words that seem nice and are good ideas but aren't actually practical? I'm thinking that's the case. Again, it'd be fantastic if everyone helped everyone and we are all a pretty little community full of nice people... but it's not going to happen. It's never going to happen. Not in DF. Having these completely unrealistic expectations of hard content in DF is the problem - whether you're expecting to one shot it or you're expecting to learn from many wipes and having everyone be fine with that. Either everything is going to go smoothly by some massively lucky RNG (aka you either got all new people/exp people willing to teach OR you got an entire group of exp people who can one shot) or you're going to have some level of discourse in your party. You could get kicked, you could be the one doing the kicking, things aren't going to go swimmingly one way or the other.
I've been in many, many T7 DF attempts and I've helped many, many people understand the mechanics of the fight. It's probably the easiest fight in SCoB in terms of how easy it is to explain and not get everyone wiped. I've learned a few things from this:
1.) Some people can understand "if you have the triangle debuff, look off the edge before the timer reaches 0, stay looking off the edge until the debuff goes away" and some people can't. Eventually they will learn (freezing everyone multiple times tends to do this) but not everyone has the patience for that.
2.) Some people will leave after one wipe. Some people will give it the entire dungeon timer before they give up, even if they're experienced. There hasn't really been one appearing more than the other, sometimes you get a group where half the people leave, sometimes you get a group where no one leaves, sometimes you get a group where everyone leaves... it's random.
3.) Very few people actually go in without knowing the fight at all. Usually, within 3 or so runs, I'll get 1 or 2 people who say they've never done the fight and know nothing about it, and that's when I give a detailed overview at the start of the fight and work my way from there.
4.) Don't have expectations. I literally go into T7 thinking that no one knows what they're doing, will get us all murdered, not listen to advice, and vote abandon after one attempt. If you're expecting to clear, don't. If you're expecting to make it past one attempt, don't. Whatever expectation you have will be completely out the window no matter what it is after enough times in the DF.
It's a very pretty sentiment to think that everyone in DF should change to fit your needs and wants, but it's just not going to happen. I'm really sorry, and if you feel this way and we happen to get into an instance together, I'll literally stay the whole lockout and teach whoever I can. I, however, recognize that a large amount of people aren't like me and those people populate the DF en masse. Instead of complaining or expecting to "fix" the problem, I get on with it. It's a thing you have to expect, it's a thing you have to live with. If hard content wasn't in DF, however, this wouldn't be an issue - PFs would be set with expectations of the members in it and they would join the parties that meet their expectations. These still happen and on more populated servers they're a common occurrence vs taking your chances in DF, but as long as it exists you're going to get 8 people arguing in a party because everybody had an expectation that wasn't met.