Sorry for late reply, its Web episodes released between first and second season, bit of flashbacks, I haven't seen it entirely either. If you Google it can watch it online I think.
There are Origins after season all seasons
Banshee Origins S1E01.Olek Drops a Dime
Banshee Origins S1E02.A Thief, Not a Killer
Banshee Origins S1E03.Carrie at the Gate
Banshee Origins S1E04.Looking for My Exit
Banshee Origins S1E05.Sugar's Release
Banshee Origins S1E06.The Forge
Banshee Origins S1E07.Siobhan Interrupted
Banshee Origins S1E08.Kings and Pawns
Banshee Origins S1E09.Checking In
Banshee Origins S1E10.Carrie and Deva
Banshee Origins S1E11.The Women
Banshee Origins S1E12.Passed Over
Banshee Origins S1E13.The Real Lucas Hood
Banshee.Origins.S02E01
Banshee.Origins.S02E02
Banshee.Origins.S02E03
Banshee.Origins.S02E04
Banshee.Origins.S02E05
Banshee.Origins.S02E06
Banshee.Origins.S02E07
Banshee.Origins.S02E08
Banshee.Origins.S03E01
Banshee.Origins.S03E02
Banshee.Origins.S03E03
Banshee.Origins.S03E04
Banshee.Origins.S03E05
Banshee.Origins.S03E06
Banshee.Origins.S03E07
Banshee.Origins.S03E08
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I gave up right after the first season. No way in hell I'm gonna watch that.
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Indeed. It just made the whole thing disgusting for me.
I don't know why you are criticizing it so badly, I find it entertaining, violent but in a good way.