Channing didn't like Tate.
She didn't know Tate at all but she didn't like him.
Everyone else had failed in protecting Bo.
All 20 candidates could not do it. They quit or got caught and/or killed.
Winter was certain Tate could do the job better than anyone.
Channing didn't like Tate.
Winter thought Tate could do the job better than anyone else and that meant her.
Tate was not better than her.
Channing could hack and control traffic lights, security systems in seconds. Channing could break into a government facility and free Bo. She could get into the main frame of a prison and break a death row inmate out.
Tate couldn't do a smash&grab without getting caught or hurting someone. But Winter believes in Tate.
That's what bothered her most.
Channing didn't like Tate.
Winter was her teacher. He was Channing's mentor. She wanted his praise and belief just as much as her own father.
But Winter's believed in Tate and that Tate was the perfect one for the job.
It grated.
It grated so much Channing couldn't see that Tate was Bo's father and she was stronger with Tate. She could become stronger and not deteriorate like others have.
She couldn't see that if she had the job she would not be as useful. She wouldn't be able to keep them from getting tracked. She couldn't use computers or get them out of jams if she was the one running place to place. The job was for a parent and Channing did not want to be Bo's mother. Friend or big sis yes but she did not want the day to day job.
It took Atlantic City for Channing to figure out that Winter picking Tate did not mean he didn't favor her. In fact, it meant that he trusted Channing most of all. Winter trusted Channing with all of their lives. It was up to her to keep Orchestra and the Feds off their trail.
Her mentor needed her.
With Tate in the picture, Channing was still Winter's right hand man and that is what Channing wanted most of all.