Random groups are toxic by nature. When the chances of dealing with someone again are pretty slim people are unsurprisingly rude to each other.

When encountering these situations I've found it best to either leave, or try and finish as quickly as possible. Engaging in dramatics only makes them problem worse, and generally will only make you even more mad.

That being said, I have always found "Letting other people die because I am god and you should dance for me" is on the top list of toxic behaviors.