ETA: This should’ve quoted an earlier post about how Sarah talks to F on her stories.
It’s clear he picks up on her disdain, too. He was so thrilled to be on camera before she made the disparaging comments about him/his hair. After that, his own tone switched up real quick. Pouting face, body turned away from everyone else, and saying he didn’t like her cooking. Kurt’s uncomfortable cough and then his attempt to course correct just makes the familial dysfunction even more obvious.
At this point, I truly think she is an abuser behind closed doors. Kurt probably gives as good as he gets verbally, but he seems avoidant instead of being an instigator. I reckon his closest friends were pushed away around the time Sarah started showing her true colors. Kurt can be a jerk and incredibly offensive, so he probably figured it was just their “dynamic” and agreed that those friends had to go. Unfortunately, now that he’s picking up on how toxic this tit is, they’re two kids and half a dozen business ventures in with no easy way out.