Mc and seven were friends since 14(?) years or something so I can understand them being completely hurt by the fact that MC simply watched it all happen. Like yes, you can choose not to vote them out but so far in the narration it seems like mc didn't fight for seven, the way seven would have fought for mc if the same happened to them. They could have done more than simply stand by and watch. Seven is more bothered by the fact that MC just let it happen. The vote never really mattered to them.How so? Some MCs did not vote against them, it's not even their fault but hatred seems to be directed mainly at MC. This one reason just seems ridiculous.
However. You don't have to feel the same way. It is completely understandable for you to find seven unreasonable, oversensitive, entitled and childish, since that's exactly what they are.