After playing spawn spinner a few times, I notice a lot of times I can’t hit the chickens without putting myself in great risk (I uses a BX-9.) This would usually lead to around 20% of the enemies escaping before I could’ve killed them.
There should be anomaly zones on each side of the screen that allow you to change your direction so you can hit the chickens. This or prevent the ability for enemies to leave the wave.
EDIT: I think that the zoom-out was rather unnecessary because I never had trouble dodging the chickens, just killing them.