Exactly, if Carol does something badass to stop Negan it would probably put me off the show for good.
Why anyone would get duped by her in the first place I don't know, there should be no frail or dainty people left at this point in the zombie apocalypse for anyone to underestimate.
I'm sure all the background characters at The Kingdom are frail and dainty. And The Alexandrians were until Rick and co showed up. Some of them still are.
How many Walkers has Eric (Aaron's boyfriend) killed, for example?
To be honest Alexandria was a bit of an anomaly when it showed up, not much about it made any sense, even more so that apparently Negans gang know about it already. BTW same for the Kingdom.
As for Eugene, fair enough he is frail and dainty but he is smart and has something valuable to offer whether its lies or the truth, even Fr. Gabriel had to toughen up quick, most groups would realise there is no room for passengers who have nothing to offer, so Carol must do something that keeps her around, even more so when Ricks group were on the road.