Ragnarok's is generic movie trash. The Spider-Man 2 trailer music? Really?
NK's is generic metal trash. Sabaton is garbage music for weebs.
Guardian's song is a classic, but considering how shitty they perform during war it might not be an ironic choice.
Polaris' music, like their alliance, is derivative bilge.
Vox Populi exists in PnW? auto-disqualifier
Zeon using Unicorn's OST is sad. Unicorn is one of the worst Gundam series.
CoS gets a negative for using rucka rucka ali in spite of being filled with SJWs who would yell frothing at the mouth if anyone sang his songs
KT's is just racist bilge
Valkyrie's music is ... well, it's forgettable fantasy rock. Like if someone listened to Stairway to Heaven and wanted to make LOTR music but forgot that it has to be good
Dark Brotherhood just ripped generic background music from an online game's DLC
Basically the only one that's even a good song is Guardian's