I think it made her look horrible. She tossed Tillerson and Kelly under the bus without any proof only to make herself look good. What did she accomplish? Disagreeing about policy (which Kelly claims) is not "undermining the president". I've lost all respect that I had for her. Snitch.
I think you're missing the bigger picture. Few people are happy with the status quo and see that things need to change. How can we ever expect things to change if government employees supersede the goals of elected officials? They are comfortable with what has always been, even though people want change and vote accordingly.