Why is nobody asking for advice on how to play?

You don't know that. What gets me is when someone post a opinion and expects everyone to accept it as a fact. Then they cry nobody wants to learn. Give me a break. I forgot no one lies on the internet

Can you think of a AAA MMO that can be successful and profitable by only appealing to skilled players? Are there any dev team so self destructive as to only appeal to skilled players? The latest example was Wildstar last year which was targeting serious, skilled players. Last quarter their revenue was what some Japanese mobile games earn in a few hours; not a success.

Well as a nerdy bedroom (our basement is terrifying, no one will ever get me to dwell in that kingdom of spiders) dweller, I'd say being good at the game is for those that find fun in that. I'd rather play the umpteenth alt through the story (hence why I stay out of non solo FPs and OPs and WZs and leave those to the people who like them without inflicting my anxious, semi skilled clicker self with bad coordination on them) than beat on that training dummy till I manage to get sufficiently great parses. (I tried once, actually, came to the conclusion it wasn't fun for me personally, did some story missions and stayed out of the way of those that like the more challenging group content so they can have their fun.)

Getting really annoyed seeing these threads pop up.

Did the forums look like this with page after page of people complaining about not being able to do content they could on Monday before 4.0?
The answer to that is no, so people played 1,2,3 and 4 just fine (for the most part with a few issues exceptions).
Then 4.02 happens, and suddenly those same people that have been playing for years when the game was harder, now those people need to L2P? this is essentially what you said veiled or not.

and then there's this.. so obviously they see a problem..

I mean, there's that, but also, why does it matter? Is a ~below average~ player's money somehow worth less than a skilled one's? Are they somehow worth less as a person? Is there any point to arguing and screaming at people to l2p instead of searching for a solution thatm'ets both groups have their fun? Because of there is, I really don't see it. I'd much rather casual players of any skill level can enjoy the story -- all of it -- and those that want more challenges get content tuned for them, be that HM Heroic Star Fortress or the ability to have more control over a companion's power or whatever else.

If your having fun playing the game then your doing it right. That is all that counts.

Pretty much. SP games solve this issue with different difficulty settings where people like me can play om the lowest and those that enjoy challenges on the highest (I'm especially fond of the trial system BW introduced in DA:I's patch 10 because it lets you customize difficulty even further). And I guess that doesn't translate so well to MMOs, but there has to be some way that lets everyone -- or at least most -- have their cake and eat it too. Not a whole lot of point to having cake if you can't eat it after all.

Do you use Whirlwind? Take an enemy out of the fight and you are much better off.

With Madness, you need to be careful of your AoEs so that you can take an enemy out of the fight. But just doing that removes most of the problems with a spawn. But with Sorcs/Sages just make sure you're using your self-heal when needed, and keeping bubble up at all times. That's half the battle right there. Then it's just keeping your gear up.

What class(es) do you play Leklor? The use or non-use of a DCD really depends on the class and the recharge. I do know that a lot of players hold their DCDs too long. Especially with mitigation cooldown, you DO need it at the beginning of the fight. Think of it like this:

At the beginning of the fight, the spawn is doing its max damage. All the NPCs are alive and trying to kill you. With a DCD that increases defense or resistance, the best time to use it is proactively, not reactively. Plus as someone said, this gives it time to come off cooldown before the next time you need it. Using it when you're already down might allow you to survive, but using it earlier might have given you time to lower the damage of the spawn considerably. This can lower downtime and make things much smoother.

The other thing to be mindful of is your crowd control abilities. Taking enemies out of the fight gives your companion a much easier time healing. So if you're playing a Knight/Warrior, they have a 6 second mez (ie breaks on damage) that can stop the damage of a whole spawn. That's a ton of mitigation right there. And the cooldown isn't so large that you won't have it again by the next spawn.

GW1 and D3 have different levels of difficulty. This game does with ops, FPs and such.