Abyssal mobs

Can we have atleast get rid of one shot mechanic for no reason?? Or atleast give us a history damage to see what killed us !!
10k ES - 75% RESIST CAPPED including chaos, Mind over matter, ~2k mana and still there are mobs of Abyss that one shot and not knowning what killed me so fast, right now one mob jumped at me and died instantly, was an explosion? was a lightning fast attack? was bugged? was 1k crit chance with 3k crit multiplier??
Its frustrating to loose xp in this way when having alot of defense and LOOSING MAP WITH ZERO REVIVES and uncompleted map !
Every time I invest currency to a perfect waystone to a specific map and this suddenly happens, makes me to delete the game.

You die in one hit because your char isn't properly optimized or you had a bad combination of mods with the rares.

You will try to rebute this and in most cases post your POB but when we view that POB it's glass.

''I died in 1 hit!''

10k ES is alot.