마저

Even that one too

Adds the last thing you would have expected, with a note that now everything has gone: even Kongjwi's father fell ill, even the air fryer is betraying her, even the hyung he trusted, even Sung Min. Its particular flavour is that this was the final one left, so it often carries disappointment or betrayal. 조차 is very close and stresses that the case was extreme rather than final; 까지 says 'even' without either shade.