Is it wrong to run Castrum Abania as a tank at ilvl 272

[Mizunoko]

I have mained tank since the release of ARR i know my role well and i'd like to think im a decent tank and person. When i entered Castrum Abania on my lvl 69 drk ilvl 272 as a leveling roulette queue i was nothing but disrespected by the healer and dps. One of the dps was of similar item level as me. We plowed our way to the final boss i tried to just keep to myself so i could get the dungeon done because as any roulette runner knows we do them to get things done for exp and tomes, not to sit around all day.

When we got to the final boss we wiped 3 times because 1. The dps were not killing the hand adds that latched onto the healer and thus the healer could not heal me, and 2. The healer kept getting hit by almost every aoe i saw. Sure i was getting hit a bit hard but 10 ilvl difference between end game gears surely doesn't make it sooo terrible that it warrants harassing me over it and then blaming me for their own shortcomings in terms of doing the mechanics right?

On the 4th try i decided this was going to be my last because there was no point dealing with all this harassment and wasting my time even if it meant taking a df penalty. On this run i noticed our healer started prioritizing dpsing over healing, i was at low health for the majority of the fight, and not because i was getting hit alot or hard, but because the healer would just keep dpsing instead of bringing my hp back up. At this point i told them that to me it looked like they were just doing this to make themself more excuse to harass me over my gear which they did, they started saying how easy i melted, and in a way they kinda admitted it themselves when they said "it was easier keeping our dps going". I guess to summarize it all up it just feels like that because they all kept dying and failing to do mechanics they were using my gear level as a scapegoat to blame me instead of just admitting that they were not trying.

I am a veteran of this game and i know how to play and whats fair and whats not IN MY OWN OPINION, but i guess i am coming to the forums to look for a little reassurance and get other peoples views on this situation as well.

I appreciate any input and opinions anyone has as long as they read the entirety of this post and know the context before saying anything, thank you.