This isnt WoW so this toxic behavior doesnt fly and attempts to influence others playstyle is thankfully reportable
Not when that specific person's individual's performance matters little in the content they were doing since the group will still easily destroy the encounter, but hey, maybe they ll be half a minute slower which is literally the worst thing that can happen to some people apparently
Countless people have suffered and even died throughout this species entire history under people who told themselves they knew what was "correct" and were confident in it, many times telling themselves they were doing it for the "greater good", that they were "qualified" and they were "helping" while in reality all they did was enforce their limited close minded world view on people who were merely "different" because their brains were incapable to letting go of that desperate need to feel in control by telling themselves they knew what was right and wrong, this of course meant suffering for anyone who didnt fit these people's definition of "correct behavior".
The fact that you believe there is something as specific as "correct & incorrect behavior" in a video game no less makes it clear what type of person you are so like I said i feel for the people under you.
I am quite familiar with company policy and procedures and know full well what often happens in bigger companies where higher ups get too comfortable and lazy in their posts since they "know what is right" since actually bothering to improve or fix policy or procedure issues is too much work, its already good, you are too invested in the current form, too expensive to evaluate and what if weird regulations affect that fix, so let the employees suffer through an often stupid, inflexible and ineffective policies and procedures.
If you honestly knew that then you would know exactly why people become defensive and feel uncomfortable in such situations and choose to ignore people who dont know how to communicate with them, but call it "poor attitude" when that person literally asked to be left alone, but yeah, do keep calling it "confrontational" lol