It is a bother for me that the screen gets green-yellow whenever the Thorn deals me damage.
You firefight in a low-lit room and get blind every time a bullet touches you, so there's no adequate way to win any fight.
I think this effect should be less perceptible.
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If you're seriously whining about the effect giving you a disadvantage then boi I've got news for you; You're just plain terrible. Thorn is hilariously average in the Meta right now.