Idk theres something about fern. Like obviously he's a cocky loser, but like at the early parts of the game thats all he was and thats fine. But like him betraying everyone by joining meteor is like MEGA DUCHE because he's seen first hand the messed up stuff they do (Mosswater, Beryl, Grand Stairway, ect). The worst aspect of him to me isnt his cockyness, its how he treats his sister during the entirety of the game. Like didn't he gave her the nickname, which I'm pretty sure she does not like, Flobot, and just like talks trash about Florina in general all the time. This is low but not unlike what we see in reboen as titania and hardy are not best of pals either. But like its the mansion raid to me that makes fern such a turd. He initially attempts to emotionally manipulate his own sister so that she can be captured and most likely killed by the meteors. Then, when that fails, he starts verbally abusing her, can't remember exactly what was said but IFRC i think it rendered her completely silent and unable to battle. That shit is real low.
Basically Fern is just a weed that i reaally hope we get to pluck at some point in the coming episode.