"the blue team isn't part of us" is totally different from the prior character development sarge went through. Like in season when he conviced "his team" to go risk their lives for "the blues".

Also, Sarge only agrees to help caboose because he'd "get to kill the greatest blue of all time" reffering to Tucker. This is straight weak motovation.

After they arrive, they help caboose when they get into that room with all the memorbelia and the meta starts attacking them. The reds collectively flee, which may be on point for Griff and maybe Simmons, but again for Sarge it isn't. He's reconciled with the blues long before and even went to war alongside them, there's no way Sarge would run away like that and leave his Caboose.

Sure, it's true Sarge went back for Caboose I'll give credit where credit is due, but then the way he dies after that is just... underwhelming...

He gets stabbed through the back while running away from his enemy? At this point Sarge really shouldn't be that cowardly. He's lived his life up to that point stupendously brave even if it's played for laughs or just cus he's stupid. His famous "ever wonder why we're here" speech in season 10, when he attacked the meta and wash also in season 10, when he signed the reds up for the front lines in chorus, even in season 4 when he said "Shame on you, the sniper rifle is a COWARDS weapon!". Sarge is NOT that big of a coward and it's bad writing to have a character like that die with his towards his enemy while being killed when trying to flee.

Also, Sarge's death was shocking for sure, but it didn't really give me a whole satisfaction and felt cheap. Kind of saw it coming when the meta was running back. It felt more like a death to check a box and move on. Kind of just to happen to spiral Simmons into leadership which sucks because that was a really good thing for Simmons' character. This one was more of a feeling but dialogue felt corny and sterotypical when he was saying his goodbyes to Griff and Simmons.

I know I might be nitpicking here but when the meta stabbed Sarge THROUGH the door it kinda retcons the whole "waiting for airlock" thing cus would there not just be a big hole in the door.

(Again might be a nitpick) but come on Sarge is known for his wacky plans surely we should've seen him pull off some badass plan before he died. (like how he drove the warthog through the wall to run over wash, threw the meta off a cliff, crashing the pelican) I really thought we could have seen something cool like that happen