I gotta second @Greycat on this, I have seen this attitude at play in the game, once directed at me on my PB who does not use the converter in her ST attack, because the complainer failed to wait and see that the foe was dead way over there where he fell. I have seen it many times directed at other players and it makes me watch how they are doing. The number of people who use gale after the tank gathers up the clump astounds me, so I can also affirm it is, at least in some cases, a valid complaint/concern.
I don't want us to go the way of 'only these perfect builds are allowed to play' but some people really do need to learn to play, and some people really do need to stop being control freaks and dictating how people are allowed to play. I have recently learned to use the star system in the game *add note* and it helps me tell the difference between who I want to team with and who I need to absolutely (under no circumstances ever) not team with. Maybe less bitching if we all try that? And my star system is usually very secret, I won't announce "Joe Blow has 1 star, I saw him be an asshat about X and I won't team with him", I just quietly leave the team and go about my business. Much less stress during my free time fun this way 😄