>>3811640They're all idiots, but I kinda like to see them as a result of placing shonen teenage stereotypes in a craptacular setting where everyone higher than them is either manipulative or crazy. Especially now that we see that the only true important characters are Mikayuu and the Progenitors.
I also enjoy how Yuu not regretting or even hesitating to ditch them completely breaks the nakama code of shonen series.
In regular shonen, we got these random teens who get forced to hang out and fight for their lives together repeatedly. And they and we the audience are supposed to believe they're now a big happy family after a few fights even though they barely know each other.
But in OnS, that's just something Guren drills into Yuu and his teammates for his own selfish motives. He thought that by giving Yuu a nakama team, he would forget about Mika. But Yuu didn't.
Still, since Guren insisted that 'family protects each other' then Yuu reasoned: Mika is my family = He's these guys' family if I am too = I'll buy into this nakama family thing so they help me protect Mika.
You could say Yuu merely PRETENDS to believe the nakama cheesy stuff, just because he sees it in his and Mika's best interest.
However, Yuu eventually realizes that wasn't true. Guren and his teammates got their own priorities.
Guren: His friends whose death clocks are ticking
Yoichi, Kimizuki and Mitsuba: Their dead family members
Shinoa: Yuu, but she's delusional and entitled enough to think he'll ever want to be with her without Mika in the picture
Yuu did want to protect them, but the moment their priorities collide, he drops them like a hot potato because they made clear they don't give a crap how he will feel if he loses Mika forever. They don't want to understand Yuu will be in the depths of despair without Mika. Anyone else's love and friendship means jack shit to Yuu if Mika isn't part of the equation.