Seeing as we know that the Artanis FP’d then one of you, slyv or thrall threw in draft by not selecting a tank. I’m going to assume you last picked and didn’t take a tank when your team needed one. That’s probably why he flamed you.
Also, trying to solo tank Artanis vs Auriel and Johanna usually goes poorly so while he died too much, it’s not like he didn’t have a reason to be dying somewhat frequently.
If I were you I’d worry less about my teammates and focus more on my own play. That means drafting your best but also drafting for necessity if your team isn’t grabbing a tank / healer buck up and do so yourself. It sucks but you have to do it sometimes.