Unfortunately because of the way Ion has designed loot (2 pieces per 20 people) the raid lead in this instance was 100% justified in kicking you out… if you had already killed the boss (which would be the only valid reason you could not loot the boss) you would be reducing the amount of loot that can drop because its now ~19 eligible looters.
Blizzard designed a terrible loot system that creates these incredibly toxic environments because they either don’t care or are oblivious to their design decisions (good job spends 8 weeks “balancing” covenants, people are differentiated for that reason too).
Blizzard made the game interesting for them to design not for players to play… Ion has got to be fired arrogance like that cant be allowed to tank the game further.