I figured the fact that the guards are unkillable was enough of a clue to the fact that you are not intended to fight them, by design.
the guards cheat with in creasing damage that scales to your health
STOP CHEATING ZOS
i hope this is a REALLY bad attempt at rage baiting or "trolling" lol
By math the guards should not win but the damage scales.
1: learn to stealth better.
2: you're not meant to fight the guards.
3: the damage they do actually scales with time, not max health.
4: survive agsaint a guard long enough and you'll get to see their "riot control" attack which is unblocakble, undodgeabke, area attack that does ~400k damage.