For me just opinions
Under 2300 grimoire
Hezens vengance users
Fusion rifles
My team in crucible because they always get only 1000 points in a match
Blue guns
People without atleast 10 exotics
Havent done hard crota
Cant run sword
Cant run relic
Suck it noobs
Git gud scrub
Scrubs
3 of same class
Grab heavy ammo without waiting in pvp
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Some blue guns have perks that are super useful, fusion rifles are good in their own right, and running sword is something you don't have to do if you have someone who is good at it