I think they're angrier that she isn't courting them vs. local media and more diverse journalists (who they consider lesser).
The 'define her' game has largely ended, according to the new polling - Harris' favorables among voters are all up. They've gotten to know her and like her. I do think Harris should do more interviews both as candidate and potential POTUS, but for now the campaign knows Axios, etc. mostly want to play gotcha games and drive narrative with responding to Trump and she's not giving them that oxygen. She's doing media and interviews her way.
Harris has an interview with Oprah today, I believe.
Meanwhile: The ever-angrier Jonathan Martin continues to play "Here's How Bernie Trump Can Still Win", inexplicably citing states that Trump lost 2 out of 3 last time as an 'electoral firewall':