I apologize, I'm going to break down part of my response since you seem to be taking it personally.
My response:
Yes, I was taught that as a tank, I should keep 100% of the enimity 100% of the time. If I didn't, then it was my fault. No excuses.
No excuses.
That is in reference to what I was taught and what I aim for. I should have aggro all the time for all the things. To the people I learned from, saying "The BLM or ARC did not use quelling strikes" and I lost hate was not good enough. It was only an excuse, and they would not accept it. Their answer to those times were "You didn't do your job properly."
I am not saying you did something wrong. Only, the standard I try to hold myself to. I am not going to say that I achieve it 100% of the time, I don't. But, I am always going to aim for it.
On the rest of your original post, I pretty much agreed with you that, given your side of the story, they were a bit over the top.
I do not agree that a couple or a few bad experiences with a group equals they are toxic. If most of your experiences are positive, then saying they are bad is not truly representative of that group.
You said you have done 3500 dungeons, how many have been truly negative experiences?
And since you tossed out some numbers, here are some of mine:
I also have 2 tank mounts, DRK and PLD
I have completed about 6,000 dungeons
I completed all 13 turns of coil
I completed 6 Zetas, 4 are in some stage of completion.(PLD, DRG, BLM, WHM, BRD and NIN)
I have all 13 animas in some stage of completion. (SMN, WHM, AST & BRD are all i230 or higher).
That is only for my main, my alt has done many of the same things, zodiac, anima, coil, etc.
I think I can also say that I know things.
I do not think the community is toxic or overly toxic. There are bad people in the community, but they are the minirity of people I come across. Most are at least decent people, some are nice.