She was never hypocritical.
That is a matter of opinion, she tells Harry all the reasons why she won't give him back the Swords.
Then she violates one of the main rules governing them..
When she picked it up again it was because she saw no other option. That does not make her hypocritical. I think describing her as hypocritical is a complete misunderstanding of her whole being.
It isn't about her picking up the Sword, that doesn't make her hypocritical.. After her very long soliloquy implying if the Swords got back in Harry's hands they could be misused but if they stayed in her hands they wouldn't.. It isn't about her using the Sword, it is about how she used it.
Here is the definition of a hypocritical action;
adjective: hypocritical
behaving in a way that suggests one has higher standards or more noble beliefs than is the case.
"we don't go to church and we thought it would be hypocritical to have him christened"
When Nic surrendered, gave up both noose and coin, instead of accepting it as a Holy Knight, or knowing the rules for the Swords.. Judgement wasn't up to her, yet she felt that he should die, judged him, tried to kill him and broke the Sword.. That wasn't doing what she had to do, it was doing what she knew to be wrong after berating Harry about the rules governing the Swords and why they were better off in her hands. That my friend is hypocritical.
But what her choice made clear is that she was more suited for another mission.
That has nothing to do with it, if it made anything clear, it was she had no business keeping the Swords once Harry came back.