The thing about The second season is that, It is a Win or Nothing. and as we know they choose that way, at the consequences of their lives. it is very heartbreaking to see, but we already know it either ends like that or we just have that casual anime stuffs having it ended like that is like life, things are unexpected. it can go from perfect to worst in a snap of finger. they fight for what they want in life To Be Human, And survive this is one of the most brutal the gundam series have ever got (that i've seen) as we got blunt weapon ratherthan lasers and stuffs

but yeah that may be it

you might find this a bit too deep, but if you watch the anime closely. the meaning is deep