I really dont understand all the hate for the Blades, I think the Greybeards are much worse:
first off all, They do NOTHING, they just sit their on that big mountain, give a [censored] what's happening to the country and people in Skyrim. They just let things happen even if Alduin destroys the World, they don't care, if it's destined, so be it...BS! Furthermore they knew about the Shout Dragonsrend all along, but do they tell you? Just after heavily asking and insisting on your side they confirm it exists...
As an Imperial, I'm really pissed at them, that they taught Ulfric Stormcloak the Thu'um. They pretend to have a policy of peace and and not interfere with worldly matters, but they give him the power that ended up murdering the High King. Good Job! (You may see this different as a Stormcloak

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At last Argneir liead to me about the Blades, saying the NEVER trully intended to protect the dragonborn/emperor, and are just a bunch of selfish, power hungry Dragon Slayers. That's an insult to the memory of my former Blade Companions like Caius Cosades and will get him his throat cut once this is all over.
I really dont want to kill Paarthurnax, but for the Greybeards I'm not so sure...