I am infuriated and in tears, about to quit again

[Sapphic]

(for the record, a ninja loot is something that you expect to get for reasons, only for it to be snagged from under you regardless. i try to bring my A game regardless of the content, despite never being rewarded for it.)

That is still not "ninja looting" do you even know the definition of it while spouting nonsense? Just because you rolled a 98 or decided before that x loot is yours does not make it yours, unlkess you went in as a full premade party and rules were set beforehand, then it is a reportable offence if someone agreed, if a random joins who didnt then they arent part of that agreement and do not need to abide by it. Doesn't matter how much "effort" you put in, you are subject to RNG along with everyone else.

Try and getover your self entitlement issues, you will be a lot happier

It took me over 100 runs ( I know, I kept count for some strange reason:P) clearing Garuda HM back in the day to get PLD sword to help me to clear Titan HM, after about 30-40 runs It dropped, I asked the other PLD if he would mind passing, he didn't, he won, I shrugged and kept trying till I won it. I never felt I was entitled to automatically obtain said weapon, regardless of how many times I had cleared the content or how much effort I had put in. RNG is RNG.

I always thought Ninja Looting was a throw back to older games where, when you killed something, it would açtually drop loot that you had to pick up. Someone would camp and run in and grab it before you could. It can't even happen in this game. Though your agreement scenario is close. Its just a term entitled players use to slander others who got the loot they wanted.

Exactly this. The agreement prior to starting the content is something that is backed up by SE, and if you break the agreement then it is reportable. There is a GM post verifying that buried within the forums somewhere.

It has also been done where the raid leader sets loot rules to master loot and takes everything.