Yeah. If a tank is doing more damage than a dps, something is wrong. But instead of bullying and belittling, you could say something like, "are you doing this? Is this in your combo?" Could take a moment to ask what is going wrong and offer suggestions.

Yeah, you maybe shouldn't have to teach someone their job at titan ex. But in a perfect world, wouldn't need parsers either. If you can't or don't want to teach and it is such a problem for you, as I said; run with your fc and only your fc.

Either way, it is a risk you are taking. If you wanna parse when it's not allowed and bully someone over it, and have them report you, that's fully your choice. No one to blame but yourself. Can say they need to grow thicker skin all you want. Won't fix anything.