So as a character in this series, I do not dislike Kathleen. I think she served her purpose. I really do not understand why people would whine about her not being leadership material, when it was pretty obvious from the last few episodes that she was never a good leader. She was basically riding the coattails of her dead brother.
In our country, we had something similar back in the 80's. Where our then president (who is the father of the current one we have now) ordered the assassination of a senator who was also his main political rival. That senator's wife who was a housewife then, had no political background then became the face and leader of the resistance that eventually overthrew that president.
If you made a film about her now, she'd probably not strike anyone as someone who could lead the resistance, because she was softspoken and was actually considered as a weak leader. But people followed her.
I kinda remembered her with Kathleen mostly because of the circumstance (an oppressive regime kills the leader of the resistance so his "partner" takes over). She on the other hand, was ha horrible person and I felt the show portrayed that well enough.
In the span of a few episodes, we saw the lost humanity in Joel, how humanity can thrive through love with Bill and Frank and now how lost people truly are. Ellie and Joel are both undergoing a good arc too as their relationship grows. Ellie saw how easy it is to end up alone again (her fear), and Joel can see how fast it is he can lose someone important again (Henry and Sam).
I am really digging the series. I can't wait to play the game after.